"InFocus LightPro 550, w/155 ansi lumens, onboard audio, and accepts computer, s-video, and component inputs, and 640 X 480 resolution". Is this a "good" starter projector? Isn't the resolution good enough to display full 480p DVD video? I want to have a screen about 6 ft. wide. Thanks PS- Can anyone recommend some minimum parameters for a projector I should be looking at, such as lumens, resolution, etc.? I only need a prjector to display DVD's full 480p resolution, not HDTV.