There is very little on the list which has changed.
One of the biggest issues, IMO, lies with the existing 4:3 screen and the depth of the room.
A 1920x1200 projector will look much better than a 1024x768 projector, but your screen is 4:3, so either you force it to 4:3 aspect ratio, which all projectors don't support, or you get a new screen.
I would get a new screen, which has a price associated with it, but in a standard drop tile ceiling, is an easy installation.
That's going to take part of any budget and needs to be done by a professional A/V company.
The bottom line, if you are looking to upgrade, and intend to take it seriously, then it's time to replace the screen for one which is native widescreen.
Now, I've gone through and the screen size is a significant issue. A 100" screen from 11.3' throw distance (widescreen) can be handled by 12 projectors in the $2,000 range.
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None of them are higher resolution (1920x1080 or higher) which I would ever consider. BenQ and Viewsonic = nope.
So, at $2,000 you are stuck with 1280x800 resolution really.
I went ahead and left DLP in the list, despite the potential rainbow effect, you get some decent projectors at good prices with DLP which can help, but I would still stick with LCD if possible.
I would probably go with the Epson at the $2,000 price point...
Epson Projectors: Epson PowerLite 1925W 3 LCD projector
If we make a small jump from a 100" diagonal, to a 110" diagonal, we drop from 12 projectors which will work to 5 projectors, based upon an 11.3' throw distance.
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I would go with the Boxlight from that list.
Seeing as how we have a huge drop in projectors available based upon a few inches of throw distance and the screen diagonal, I will stick with 11.3' throw and a 100" diagonal widescreen for the rest...
There is not much in the jump up price category of $3,000 which interests me...
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We just don't really get into higher resolution for that price jump and we get the introduction of Sony commercial models which I've already stated is not a brand I would recommend.
Mitsubishi certainly makes quality DLP product worth considering, so their first on the list is likely my choice...
Mitsubishi Projectors: Mitsubishi FD630U DLP projector
No lens shift on the Mitsubishi may be a deal killer.
DLP is the downside, but everything else is strong and the 1080p resolution would be the perk.
We also have the previously discussed Sanyo projector and a couple of new ones which are worth considering.
Specifically:
Sanyo Projectors: Sanyo PLC-WM4500 3 LCD projector
Which, while lower resolution, does have lens shift. It will require the lens, which I did not price out.
When we jump to a $4,000-$5,500 range we get a few more models...
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At that price point we still don't get a bunch of higher resolution projectors. You can see that most are still 1280x800 WXGA models. What you end up paying for is a jump in brightness mostly, which I don't think is worth it.
Hitachi has this, which I think is pretty exciting...
Hitachi Projectors: Hitachi CP-WUX645N 3 LCD projector
Lens shift, LCD, digital inputs, plenty of lumens for the screen size, and WUXGA resolution native.
Opening things up more for price, but narrowing things down to LCD and 1920x1200 native resolution gives us some different results...
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We get a Sanyo and NEC in there which are both definitely worth consideration and both have lens shift and plenty of lumens.
While I'm not a huge fan of Sony, the fact that they have a 1920x1200 projector for such a good price should put them in the running. Close to the $3,000 price point... Man, I might go with them and then upgrade the screen. Understanding the potential headaches of dealing with Sony ahead of time. They still make a good looking product, but are a very large corporate entity to deal with.