well i own a happauge usb tuner, and it's pretty good. There is no instillation, the only problem is the picture is not that great. Umm i have never used an internal tv tuner, but to me i wouldn't want to get one because of instillation, and you can't just move it. What are you going to be doing with the tuner anyway? If you just wanna be able to catch your favorite shows then the usb is good, but if you want something with more quality than go with pci. Oh and someone mentioned that there is no encoding or something with USB, thats true, i don't have to do anything with my files after i record, they are easy to watch once i stop recording. Oh and if you plan to play console game son your computer with the tuner(i use mine to record halo footage, and at first tried to play on the computer) there is about a half second of lag between images that would be on your TV and thourgh the usb tuner, i don't know if this is true for the pci tuner.
