I have had a CFX3200 DR/G (Socket 939/Crossfire) board for I guesss 3 years now? This was the first board to support CXF 16 lanes X2 at full speed.
Absolutely love it.
The BIOS on DFI boards is really, really in depth...they are made for overclockers. DFI builds with premium quality parts and extreme overclocking in mind.
I haven't ran Crossfire on the board, yet. Been waiting for ATI to come up with something worth putting into Crossfire!
Almost CXF'd my 1950pro, but decided to go with Vista, and wait on a decent DX10 card from ATI, at the right price.
I would recommend a DFI board to anyone with a little building experience, they are really not meant for beginners.