Well, I'm extremely new to the business of using my computer to record and stream hd channels, as I have been using a top box (or whatever the cable companies call it) and just want to get rid of it to save money. The PCI express tuners on Tigerdirect are all quite a lot more expensive then the regular pci and usb tuners, and I really don't know what I need, except for the fact that I don't need mobility because I plan to keep the computer in one spot. Also, is there any other software or hardware I will need for streaming/recording all my hd channels through the tv tuner?