There are onyl 2 Asus 865 boards: the P4P800 and the P4P800 Deluxe. The only difference between the 2 is that the deluxe has onboard IEEE1394 (firewire)
EDIT and IDE RAID
"Issues" - Vcore fluctuates wildy between idle and load. For example, with my overclock (see sig), my idle Vcore is between 1.65 and 1.66V, and my load Vcore is 1.55V. Obviously, I'd prefer for my CPU to stay at 1.55V 24/7, which for me is no problem because I always run Folding@Home.
I wasn't aware there were any RAID issues; I run 2x36GB Raptors in SATA RAID 0 off of my southbridge and all is well.