lcd lasts longer, basically LCD for sports, and Plasma for movies, Plasma has a glass screen so if you are in a bright room you will get alot of glare, LCD has an anti glare coat so you wont notice any glare. as far as HERTZ (HZ) goez its for smoother pictures.. you wont get that blurr. Typical tv's are 60 hertz or cycle per second.. same shit.. new ones are 120.. some will notice some wont..
get 1080p for later although nothing really has 1080p yet except bluray movies. most video games and channels are 480-720p
i just bought a toshiba tv from best buy.. it was 1500 on their website, but 1089 at the store.. so make sure to check out the store for sales. I love the tv but hate the comcast HD, it sucks alot of audio skipping.. plus it doesnt help that they compress their HD to fit 3 channels instead of 2 per bandwidth, which results in a shittier picture.