A couple other things to think about to Fau...especially since you already have the PS3... get the 1080p capable set, but invest in some good HDMI cables and Fiber Optic cables for sound... It will probably cost you an addtional couple hundred, but you won't regret it. It's one of those "behind the scenes" expenses you'll appreciate later. Make sure you go somewhere and see picture qualities side by side.... it's an eye opener as it pertains to quality pictures. Judge for yourself, don't just go on price... Also, and lastly, make sure you pay attention to outputs...how many...what type...etc... Does it have a tuner, or speakers?? Don't laugh, a lot of plasma sets are just monitors and require everything for sound AND input sources...
Good luck!!