One thing that concerns me is the heat which may be dumped from a high-end display card into the case. I'd be sure that the PCI Express connector is on the opposite side of the motherboard from the CPU area. And if you can use a display card that dumps its hot air outside the case (through the attachment bracket), as a few do, so much the better.

Yes, AGP is not much supported anymore. I had to upgrade to a PCI Express display card.

My recent research resulted in me getting a BPG brand GeForce 7950 GT OC (over clocked) 256. It's a PCI Expres card, of course.

As usual, this was a compromise partly based on budget. Good prices are available on this brand and model and i'm very happy with the display card (though it is a single card type and dumps heat into the case, so that i had to install yet another fan in my current (the too hot generation) Intel Dp15GAG motherboard.

Remember that for Vue, a fast display card is not very important. It only speeds up your viewport previews somewhat - no help in getting faster render speed. So put your money into memory (meaning you need a 64 bit operating system), rather than into an ultrapower display card.