Thanks for the suggestions guys. My main concern is reliability and price. I don't need it to be really fast but I dont want it to slow me down if I'm trying to access files from it. The caviar green, from what I understand, takes a while to spin up when its been idle, I don't have experience with it but I'm concerned that it would be quite annoying to have to wait for it everytime I'm trying to open a movie or something.
As for the Samsung, I've always stuck with western digital because I've never had problems with them. Is that Samsung drive as reliable?