Just to cover what little Saturn left out...
In reply to:
This is what I use to watch standard cable TV on a projector. If you want HD or Sattelite Semi_on has more info than I do.
For standard digital satellite, any capture card will work to bring the digital signal in. Hauppage, ATi, Avermedia and quite a few others all make them. For HDTV, TV input cards are far more limitted. Once you have the signal into your TV, Dscaler does the best job with displaying it, but it still doesn't have much in the way of TiVo like functionality built in.
In reply to:
For PVR and TiVo - to record your shows on your computer for later viewing you need a really fast CPU in upwards of 2.2 GHz. Semi_On know more of this than I do.
You don't necessarily need a fast processor if your capture card has built in MPEG compression such as the Hauppauge PVR-250. Otherwise, you'll need more muscle.
What's more If you want to watch HDTV media files, you'll need a 3GHz CPU to do so without skipping.
