I was looking for a PVR solution last year at this time. Tired of paying for cable had nothing I wanted to watch. I ended up buying the SageTV software and an extender to make a PVR from an extra PC I had lying around, and I gotta say I LOVE IT. It's not cheap either, but you can mix and match to fit your needs. If you have a slow PC as I do, then the extender is a must. Nice thing is you can add as many tuners as your PC will fit for multiple sources (cable, OTA, Satelite, etc...). I have two OTA antennas facing different cities. No combiner or rotor needed (the PC does the combining). Get about 40 channels (zip=33809). Since I was paying $60 a month for cable TV, the software + extender paid for themselves in five months. I figured it was worth mentioning. Just another option.
Good Luck,
Bobby