I have a few basic questions about front projection. First how is the quality? Is it comparable to HDTV? Are the projectors easily hooked up to a computer? Secondly, how much does this cost? Is it alot more than getting a big screen HDTV? How big of a screen can the image be projected on? What sort of screen is usually used and how much does it cost? Currently I have a 36" Sony flat screen tube, but I was curious about this as I have never heard anything about it.