cinemascope

Hey guys, can anyone steer me in the right path to a good entry level projector that is capable of widescreen?

I am wonder if this is right or I am missing something. I heard a youtube conversation with a THX guy that the viewing angle you want for cinemascope is 50deg. Using this calculator http://myhometheater.homestead.com/viewingdistancecalculator.html If I put the 100" width I get a distance of...