Hi. I'm thinking about buying a projector, to use with my PC instead of a new monitor, but I have a few questions I would like answered first, otherwise I might regret buying one. 1. I read somewhere that after a long period of use, the projector can overheat and brake? Is this true, or does it only apply to certain projectors? I will be using it about 10-15 hours per day, everyday! 2. What does compressed resolution mean? I have found 3 projector's I'm interested in, they are: Epson EMP-710 LCD Projector BenQ PB2120 Projector HITACHI CPX430 PROJECTOR Which is the best one and could someone give me estimates on what they are worth? I'll be buying off eBay. That's all, thanks for your time.