Im just getting into this stuff, but i know i want a front projector. i have been researching for a month and have narrowed it down to either the optoma h31 or the infocus sp 4805 both are with in my budget and i allready compared the specs (projectorcentral.com). im using the bonus room above garrage so light will be no problem. also thinking of running an ht computer. has anyone ever seen them demoed?