OTA HD on both PC and TV

I have an HD ready TV with Sat service and Tivo that I have networked.
I would like to test out HDTV without the cost of a new Sat receiver and having to go through the pain of hacking up the new sat reciever.

That being said, here is what I would like to do. I would like to put a card in my PC that would pick up over the air HD siganls in my local area. I think we have five channels in the area. Then I could watch them on either my PC or my TV. Having PVR capabilites is secondary but sure would be nice.

Any suggestions?