I'm thinked of plunging into the world of Rear Projection and because of the lack of 1st hand knowledge am worried about drawbacks such as the constant need for calibration??? or burning in the screen??? I don't think burning is a problem (unless 2 hours a day will do it). Can anybody comfort me?? lol with a 36in WEGA - I can basically turn it on and bingo. What about a rptv, does installation come with it?