Check Slickdeals or Fatwallet for good prices on HDTVs. Anything probably 37'' or below you should be fine with 720P unless you sit really close to the screen or plan on using the TV as a computer monitor. 42'' and above you may want to start looking at 1080p, but even then, a bad 1080P HDTV can and often does look worse than a better built 720P one. Vizio is a lower end brand but they do have models that are higher in quality.
If you play a lot of rhythm and/or fighting games, you may want to do extra research on the TV you want. Some TVs will lag even when they're in gaming mode, which can mess up 1 frame links and junk like that.








