The biggest one you can find of course. :D
Sony/Samsung are definitely best, though LG and Toshiba are pretty good too. (I personally haven't been impressed with Sharp, but I haven't seen as many of their TVs) If you do go for a plasma, (which I don't recommend unless you're going over 55'') Panasonic is also good. Don't touch anything else though. I got a 32'' Vizio and I've regretted it ever sense. I mean, it's not a bad TV, but it's not worth the $75-$150 savings.
Not trying to be a fanboy. Of course, it's hard when you own the best console eve... dang it








