It is quite difficult to advise you, as we do not know how important the picture is versus the sound. If a good picture will do, but you want great sound, then you want to get a relatively inexpensive TV, and put most of your money in your speakers. If good sound will do, but you want a great picture, then put most of your money in your TV. Or you can do some sort of compromise, in which neither will be the best you can afford.
For speakers, you really need to go out into the world and listen to as many different speakers, and as many types of speakers (e.g., ribbons, domes, horns, whatever) as you can stand to audition, that are in your price range. There is no such thing as a perfect speaker, so it is always a question of which virtues you require and which vices you can tolerate.
Right now, the "LED" TVs that are sold are LCD TVs with LED backlighting (instead of fluorescent). LED backlighting is better, but you should go to a store and see if you think it is worth the extra cost.
You are wanting a pretty large TV, so you might want to also consider a front projection system, as it can be had at the same sort of price you are considering, and then the screen might be able to be very large indeed. This would only be a good option in a room in which you can control the light very well, as the room needs to be dark when using a front projector. But it can look more like a real theater than anything else.
This brings to mind something else: Generally, in a dark room, plasma looks better, but in a room with a lot of light, an LCD is often a better choice. There are other things that are different about them as well, as plasma is better for its viewing angle than LCD.
You might want to read up on all the virtues and vices of each, as there is no such thing as a perfect TV.
You should keep in mind, however, that you will buying a particular TV, not one that is necessarily generally representative of its type. It does not matter what the average of the type is like; what matters is what the particular TV you buy is like.
I very much agree with BMXTRIX about the Panasonic BD player. A cheap one from them will do very well, both with BDs and DVDs. I would not recommend wasting money on a higher end BD player, as that would mean you would have less money for a TV or speakers or....
For a subwoofer, you cannot go wrong with an SVS, though there are some other brands that are also good. How high up the line you want to go will depend upon how deep you want the bass, how loud you want the bass, the size of your room, and how much of your budget you want to go to the subwoofer.
If the speakers you select are an easy load, I would recommend going with the cheapest receiver that has all of the features you need that is made by a reputable company (e.g., Yamaha, Denon, Marantz, Pioneer, etc.). What more money gets you in a receiver is more features and a more powerful amplifier section, not better sound generally. Plus, given the fact that they like to come out with new processors that people feel the need to get, you may end up replacing this sooner than other parts of your system, though it is impossible to know for sure.
As BMXTRIX says, you will want a separate amplifier for the distributed audio, and in order for someone to help you much on that, you would need to answer a bunch of questions, like those already asked by BMXTRIX. If you can place the amplifier in a place where it is out of the way, you can look to a professional amplifier for something relatively inexpensive. Typically (but not always), professional amplifiers have cooling fans, some of which are noisy, but if the amplifier is located out of the way where you cannot hear the fan, then that is not a problem.
Don't waste money on expensive wires. You should read this:
http://www.roger-russell.com/wire/wire.htm
You can get wires from places like monoprice and partsexpress. HDMI cables can be had very cheap online, and no matter how cheap I have gone, I have never had a problem with an HDMI cable, and I have some that are less than $5 for 6'. If you need a long HDMI cable, then you need to concern yourself with its quality:
http://www.audioholics.com/education/cables/long-hdmi-cable-bench-tests
But with a short one:
At lengths less than 4 meters you can just about use silly string (OK, not really) and get HDMI to pass at any current resolution.
