If OP waits "a few more months" for improved technology, they'll never end up with a TV at all. TVs are like PCs; accept that as soon as you buy one, it'll be outdated and move on. It'll do most of what you need, for at least 10 years, as long as you don't need the latest and greatest tech (and likely, you won't).
At your viewing distance and size, 720p and 1080p are likely to look the same; check out screens in store to see if you can tell a difference (but get a 1080 if you plan on connecting a PC a lot). You'll also get a better bang for your buck with a plasma over an LCD, and equal or superior pic quality, so I'd suggest looking at those. Use the money you save for a receiver and speakers - they'll likely contribute far more to the viewing experience than a better screen.