Personally, I'd say skip the whole capture card scene. Some give very nice quality, some crap quality, all have drivers to update and many only last for one OS.
Or you can get away from all that and get a DV bridge. I was looking at capture card options, couldn't find anything that looked ideal. Found out about DV bridges and was sold. Sure, it's only going to DV codec (same as a DV cam) so you can't capture those 10mb/s raw AVIs. Just get DV, period. 3.x mb/s Capture 704x480x29.97 on a 400mhz machine if you want without ever worrying about dropping a frame. OS upgrade? No problem, no drivers to update.
Check out what the users over at VCDhelp say about it - then go look at other capture devices and see all the complaints.
Link to ADVC-100 reviews. Sony makes some DV bridges too, but they're fairly hard to find. Dazzle makes some, they pretty much, well, aren't all that great. The Canopus ADVC-100 like I bought has locked audio (never worry about sync again), just hook it up to a firewire port and you're set for life. Also runs nice and cool, composits and S-video, haven't been able to make mine hiccup.
While I'd probably go SVCD at this point if you don't already have a burner I wouldn't go VCD. VCD is great for some things, but the quality isn't that impressive and the worse the source the worse the result. With DVD burners coming down that'd be the ideal way to go of course though. If you go SVCD it'll play on most DVD players (mine likes VCD and SVCD both, cheapo Apex) and look a hell of a lot better. But above comments are more to the point.
Just a thought.