Hello! Welcome to the forum
I also live in Canada (BC). We do not have quite as large a selection of brands and products compared to the USA. And many products are sold in the USA with free shipping. We almost always have to pay for shipping up here in Canada. But we still have several good places to buy home theater equipment. And most USA brands will ship up here, it just costs extra
I actually have very similar plans to what you were describing with a flat panel television for daytime viewing, plus a front projector with a motorized screen for movie viewing at night with the room totally dark.
A $10,000 budget is pretty good. But if you want to have both a flat panel and a front projector + screen, you will have to sacrifice quite a bit on the audio side. You must also carefully consider the screen sizes that you want to use, and how high those displays will be on the wall. Let me give you some examples from my own plans.
In my case, I have a small theatre room, and the distance from my eyes to the flat panel television mounted on the wall is 9 feet. I use a 70" (actual screen size is 69.5") Sharp LC-70LE735U LED backlit 3D LCD for "lights on" daytime viewing and for playing videogames. 69.5" from 9 feet away gives me a nice 31.33 degree field of view. This means the screen is just slightly larger than what SMPTE (Society of Motion Picture and Television Engineers) says is "ideal" for HD content. SMPTE recommends a 30 degree field of view. So I happen to like a very slightly larger image
The motorized projection screen comes down from the ceiling 3 inches in front of the television. So the distance from my eyes to the motorized projection screen is 8 feet 9 inches. My goal with the projection screen was to have 2.35:1 aspect ratio movies be very close to the same height as my 70" Sharp, but for them to be wider than the flat panel LCD. I also wanted IMAX content (like the IMAX segments in The Dark Knight, TRON: Legacy, and Mission Impossible 4) to really look huge - just like an IMAX theatre
So the motorized projection screen is a 92" 16:9 aspect screen.
So, I can watch HDTV or play videogames during the day on the 70" Sharp. Then have the 92" projection screen come down in front of it - with the room totally dark - for movies. But you also have to consider how high off the ground you will put the flat panel TV, and how low from the ceiling you will allow the motorized projection screen to extend. You have to remember to leave room for the Center speaker. But you do not want to have the screen up so high that you need to tilt your head backwards and look way up!
So that might mean that you have to put the Center speaker behind the projection screen. Which would mean that you would need an acoustically transparent screen. And those are more expensive. If you do this, you also have to leave room for the depth of the Center speaker from front to back. In my case, that means using speaker that can mount on the wall. So I'd have the 70" Sharp LCD mounted with the very bottom of its frame about 33" above the floor. Directly below the Sharp TV would be the on-wall Center speaker. The 92" motorized projection screen will extend from the ceiling so that the very bottom is about 20" above the floor. And now the Center speaker is directly behind the 92" projection screen, so an acoustically transparent screen is the only way to make this work
So, this can start to get expensive. There is no question that the Panasonic plasmas are the best looking flat panel TVs right now. But the largest size is 65". I went with the 70" Sharp LED-LCD simply because I wanted the larger size. With the lights on, or during the day with sunlight coming into the room, the 70" Sharp looks very good. It retains its black levels very well, it is very bright, and it has a semi-matte screen that really helps to reduce any glare or reflections. With all the lights off, there is no question that the Sharp does not look as good as a Panasonic plasma. But that is what I have the 92" projection system for
A lot is going to depend on how far away you are sitting. Like I say, I am only 9 feet away from a 69.5" screen, and to me, that looks just right. With a 65" screen, I would want to be slightly closer.
But a lot of people sit 12 feet or more away. At that distance, I would find a 65" screen to be too small for movies. It would probably be ok for casual TV viewing. But for movies, if I were 12 feet away, I would want at least a 90" screen!
So you need to do some planning. But you will have to consider the prices, and how much they will take out of your budget, and away from how much money you will have left to spend on the audio.
What will probably be helpful to you is a list of some of the better online retailers for Canada
BestBuy.ca
Futureshop.ca
Visions.ca
avu.ca (Audio Video Unlimited)
Those are the largest electronics retailers in Canada that sell both online and in big box retail locations.
electronicsforless.ca
hd.ca
eastporters.com
quebecacoustic.com
Those are some of the best Canadian online retailers. hd.ca (Higher Definition) also has a retail showroom in Ontario.
Amazon.ca - the selection of products available in Canada is MUCH less than Amazon.com in the USA
bhphotovideo.com - B&H Photo is in the USA, but they have good shipping to Canada using Purolator where they will show you the FULL price - all shipping, border fees and tax included - before you buy.
ebay.ca - I've actually purchased a fair number of products off of ebay.ca. But you have to be aware that you will usually have to pay additional border fees, brokerage fees, and tax when the product arrives, unless the auction is from a Canadian seller.
sonicboomaudio.com - this is the Canadian reseller for SVSound. They're actually the same company as electronicsforless.ca
And if you know the exact product you're looking for, just typing the model number and "+Canada" into Google will usually bring up decent results. shopbot.ca is also a decent price matching engine for Canada.
The dual screen setup could be quite expensive. For example, the 65" Panasonic TC-P65ST50 goes for about $2300-$2500 in Canada. An Elite Screens 100" acoustically transparent motorized screen would be a bit over $1500 . And then a nice 1080p projector might cost about $2500 for something like the Epson 5020. You might be able to go a little cheaper on the projector, or you could save about $1000 by choosing a lower end projector with significantly worse black levels.
But the bottom line is that a really nice dual screen setup might easily cost around $6000-$6500. If you're ok with having much less to spend on audio, then this is ok. It's certainly possible. And you can still get a good 5.1 audio setup for $3500. If the video is more important to you than the audio, then this makes sense. You just need to be aware