I have seen the ViewSonic VPW425 42" Plasma Flat Panel HDTV-Ready TV used for $2400 and the Toshiba 50HP82 50" Plasma HDTV-Ready Flat Panel TV used for $1700. Is it safe to buy used Plasma screens? Or would it be better to go with a new rear projection screen for around the same price? Also, I don't know much about HDTV, if I don't watch TV, only play video games and watch wide screen dvd's then is there any benefit to having an hdtv tv? If rear projection would be better are there any models you would recommend? Thanks for the help.