Well, my issue with getting a 800D is the max of 6 2.5"/3.5" drives. I already have 4 drives, and am planning to get a couple 1.5TB for RAID 0 to hold games and CAD software. The 900D seems to work better there.
Hopefully it will be out by summer. Right in time for Haswell, LGA 1150, and GTX7*0. Be about time for a new system by then.