I have done a pretty massive amount of research when it comes to LCD TVs for gaming on a budget, and when it comes down to the line I narrowed it down to 3 TVs that provide the real bang for the buck. The 46 inch Magnavox 1080P ($1600) is a beautiful set for under 2G, the 42 inch Sharp Aquos ($1500) is another set (with a little better clarity) that looks great under 2G, and the crown jewel if you have the money is the 46 inch 1080P Sony Bravia. It costs a little more, (about $2200) but you know where that money went when you watch it. It's like looking out a window. I have encountered zero lag time when it comes to gaming. I have my Wii and 360 on the Sony Bravia, the PS3 on the Sharp, and everything else (older systems) on the Magnavox. Real gamers need real TVs. I can 100% attest to the greatness of these units.
http://www.samsclub.com will deliver it to your door.
I am about to pick up a 65 inch 1080P Toshiba DLP Projection TV (1500) at best buy for movies. I was pretty much against all projection TVs until I became informed of the DLP technology. It is some crazy stuff. You can go way bigger for a ton less than the LCDs of similar size, and the richness of the color surpasses the capabilities of LCD.