AGP 4X Card

I have looked and looked to find the right AGP 4Xcard. Prices are high. I am willing to spend the money but I cannot decide which. What card (in your opinion from use) is the best value for a gaming and workstation platform?

I will be using this card on a P4 system and want the ability to connect a video-editing box (you know the type that allow for easy connections at the front of the station).

Now I understand that there may be a better way to do what I ask, so if that is what you wish to offer me as advice that would be a welcome responce also.

Respectfully,
Alwaysanoption