This may be a noob question, but I just moved here from Europe and OTA HDTV is new to me I will soon be purchasing a 1080p projector to use with a PS3 for gaming and blu ray. I refuse to pay for cable service, since my interest is movies, but my wife wants to at least watch OTA broadcasts. I know I have to get a receiver box for OTA HDTV reception and I am wondering if I need to spend hundreds of dollars to get 720p or can I just get a cheaper one, even one...