As an owner of 3 LCD TVs and 1 Plasma, my whole-hearted suggestion is the 50" Panasonic 1080p Plasma which sells at BB for your price. I own the 46" model and my son owns the 50" model. My son is an avid gamer and hates his friend's TVs because of poor picture, but he loves his Plasma. Plasmas have no lag or blur, which is very important when gaming.
I'm currently debating between 2 tv's: the Sony KDL46EX500 and the LG 50PK550. I was wondering if any of you have ideas on which one is generally a better model. I use it mainly for gaming on my PS3. Also, is there any other recomended tv's under $900 that are 46" or bigger??