Hauppauge HD PVR, but I would wait a few months until the Ceton CableCard tuner comes out and get that. Then we will be able to do away with STB's and get encrypted cable simply by plugging a cable and CableCard into the PC. In the meantime, I would use the STB's S-Video output, which is, in fact, what I'm doing with my Hauppage WinTV-HVR-1600. I also have two HD HomeRuns for Clear QAM. Assuming it works, I'll be able to dump all my equipment for a Ceton 4-tuner card in the near future. That said, if you use On-Demand or PPV, you will still need your STB, as CableCard doesn't yet do the necessary 2-way communication for these things.