I bought an Epson projector which watch movies on, but I'd like to watch cable TV on it. From what I've read, I need a QAM tuner. I only have basic cable on my other TV and don't want to have to pay much for a tuner nor rent a box or card. I've seen a lot of boxes on EBay, some with DVRs, what would work? My main desire is a QAM tuner.