I have a 46" Panasonic plasma tv that i bought a couple of months ago & i'm addicted to it. If you prefer going the LCD route, get at least one that's 240 Hz. If you don't want to pay that much for one, go for a plasma. If you do have the money to spend for such an LCD (240 Hz), i'd then consider an LED instead. I believe LED's are now the way to go & will one day replace LCD's & possibly be the leading technology until something new (which is likely to happen) comes up.
I'd also go for a reliable brand name. Go for brand names such as Panasonic, Sony, Toshiba, Samsung, Sharp & LG, among others. Don't bother with the cheaper brands if you want your tv to last you more than a few years. You'll also get a better picture with the popular brand name tv.