I am running a 7800 GS for AGP myself since three months, and I'm happy. It may be that these cards are now more pricey than PCI cards - but rebuilding a new PCI-system just to put in a PCI card would cost me even more money, no matter if I do it "cheap" or not!
I don't follow the hardware trek anymore - I have learned trying to evade it wherever possible. Less stress, less costs, and happy computing nevertheless. If people don't believe me I only say Hey, play some of the old Amgia games to see the difference!
I lost a very close girl-friend when giving up on Amiga...