HTPCNews has an excellent in-depth review of NVidia’s MCE DualTV dual tuner which works with MCE, Sage, Yahoo, and BeyondTV. Here’s the money quote:

NVIDIA’s DualTV MCE has been a long time coming. It generally lives up to the hype: good noise reduction and comb filtering plus ISF certification all in a dual-tuner. Because of these factors the DualTV is now the analog tuner in my MCE 2005 HTPC.

Hat Tip: Build Your Own PVR