need some help finding tuner card that fits my needs.Im looking for a card that can pick up a cable signal from my coax cable line and over air hd.I want to be able to watch one channel and record another at the same time.it must be pci or usb because i dont have a pci express slot.Will be useing a Mitsubishi HD1000U as display.OS as of right now is winXP.any help is greatly appreciated.