I had a wintv usb reciever and just changed to a Pinical PCTV Dual DVB-T Pro PCI card.
The PCI card is fantastic it also has a remote control. The picture quality is better than any other TV in the house.
I can also record one chanel when watching another,or record two together.
It works well with the Windows xp media centre and theie programing guide,easy to recrd stuff.
It also has software from Pinical for media centre and video editing.