tv in card - internal vs. external

I'm wondering about the pros and cons of internal versus external tv-in cards to aid in the process of feeding a satellite tv signal into the computer.

Is one approach better than the other?
Thanks for the tips.
Cliff.

Most tv tuners will only tune basic television, channels 2-125. If you want digital TV like satelite or digital cable, you'll need a psi card capable of doing that. All of the VIVO and all in wonder cards on the market can only tune analog signals. Then comes a question of quality. Video cards can be limited by resolutions and clarity. If you buy a professional pci tuning card you will get much better results, because the card will usually have a DSP that will encode high resolution mpegs quickly. If you recording high-def tv, get a pro card, if you just want to dub a few things or watch tv on you computer, get a vid card capable of tuning tv, or a digital card for digital systems.