This is not a flame. But I think someone would have to be a complete moron to build a AGP based system ground-up right now.
The only excuse is being uniformed. Even that is not a good excuse, and worth kicking yourself over.
If your spending the money, dont let the $50-100 difference from the 6800GT AGP to PCIE sway you.
WHY are you upgrading? To get todays technology (PCIE), or yesterdays? Which you likely already have?
Its something to think about. I'm dumping $1200 or so on a whole new system as soon as Newegg gets NF4 SLI boards in stock and I'm getting the 6800GT PCIE for about $450.
Rollo said AGP is great bang for buck... is it??
I'll be putting another 6800GT in SLI mode in a year or two and getting stellar performance. Then who has "bang for buck"?
The AGP system or the SLI PCIe rig?
Moral of the story is, if you're going to blow that kind of money.. spend the extra premium PCIe (and preferably SLI as well) requires.
If you dont get SLI, fine. At least you will have a good PCIe video card that is at least capable of going into a SLI rig or motherboard, the one you will likely buy when you wake up and realize.. DAMN it WAS worth it!!!!
