What is your guys opinion on PVR/DVR software for PCs? I've heard they are getting pretty good now. My ReplayTV (original, first-gen replay) finally crapped out on me, so instead of shelling out $300 bucks for one I'm interested in what the PC ones can do. I already have a TV Tuner in my NVIDIA graphics card. The only program I've heard of is SageTV. Any comments or suggestions? Thanks!