I would highly recommend a Hauppauge WinTV card.
Many users on this forum have got the WinTV USB (I haven't myself) but because its USB it should be VERY easy to set up.
I have the WinTV Nicam card, which has a lovely Philips tuner within it and receives lovely pictures and crystal clear picture capturing. (depending on your reception)
The Nicam is worth it as well, it really boosts the sound and I always get complemented on the audio of my video captures.
Also, the tuner within my TV Card is VERY sensitive and will normally pick up a DX signal from the continent when a normal TV can't. Then again, I don't have a fancy TV, its only a 14' VHF/UHF Grundig, I don't have lots of DX equipment.
Anyone can do it, I would attempt to explain what DX means but I'm sure Roxof will do a much better job, so I'll leave it to him. He knows his stuff!