Thanks for the response, bubbagump. It's clearer to me now. I'm also glad to hear the x800Pro comes in PCI-E as well.
So if I'm looking to get the best-of-the-best, I should definitly go for the PCI-E? Right now all I'll be able to afford is one x800Pro, but eventually I could add a second x800Pro (or something better) in there and get twice the performance?
That sounds great.