PCI-Express and Video Capture

I’m planning a new PC and am aiming at some of the latest technology. I want to have a PCI-Express video card, but I also need to capture video. I have been using an ATI AIW Radeon in my current machine, but the ATI AIW X800 for PCI Express is about $700 at NewEgg (I couldn’t find the X600 anywhere). So I thought about getting a non-AIW video card and a separate capture card, but I’m looking for suggestions for a good capture card. Wouldn’t it have to be regular PCI since the graphic slot is already used?