Buy this:
http://www.bestbuy.com/site/Insignia...&skuId=9748831 , thank me later. I got it for my dad for $369 on black friday. It regularly goes on sale for $399 which is an absurdly good deal. I have the 50" version and it's outstanding. These models are actually rebadged Samsungs which is why the rating and quality is so high on them. Shadow is right, the numbers and specifications don't mean shit on TVs. Also, if you go in a store and say "gosh this one looks the best out of all of them," I will punch you in the nuts. Those things are hooked up through COAXIAL cable on standard def channels and none of them have been calibrated. Customers and employees are constantly dicking around with the display settings on them as well. It's absolutely impossible to gauge the quality of a TV from a display unit in a store. Don't discount a TV because it's "only" 720p either. Humans can't even tell the difference between 720p and 1080p unless they're sitting REALLY close to the TV. And even then, it's the digital signal and progressive scan technology that's making the biggest difference on the TV, not the resolution (though it does matter, just not as much as people say). Most PS3 games are 720p, and the 360 can't display true 1080p (only 1080i). A huge portion of HD TV stations in my area broadcast at 1080i but it's not true HD. Most are going at 720p, just like Netflix streaming.
You can connect it to a PC through HDMI if you get an HDMI compliant videocard.