If you have 1st hand experience, I'd really like to hear from you!!
I've been building computers for years now... I've used Abit, Asus and for my last few build's I've be pretty partial to MSI....
I've never owned a DFI board, but I find myself leaning in that direction right now... I know it only has 3 VC slots, but to be quite honest, I don't even see myself doing Crossfire, much less CrossfireX!!
That being said, down the road Crossfire may be a good option, and having the 3rd slot to stick an old card in for physics would be nice to have!
I've been around long enough to realize that being an early adopter of new technology (especially Chipset and Processor at the same time) is risky.... But there is just something about Phenom that intrigues me, so please don't recommend Intel boards (Sheesh!)