If you want very good and totally hassle free, don't bother with an internal capture card. Look at an external converter such as the Canopus ADVC-100 and a firewire card. You should be able to pick up both for about $300. Yes, that's more expensive than one of the ATI boards, but the quality is much better and it is about as trouble-free as you can get. It's definately worth the price.
If you already have a DV camcorder that has a "pass through" mode, you would probably be able to use that in place of the external converter and still get the same result.
If all you need is a video capture card you could use a $40 ADS Pyro card. For analog to digital transcoding, your camera will probably work. Mine does.