OK I got a little carried away. Maybe I am a little bitter. But that 12 core xeon will run circles around the base New Mac Pro, and have tons more storage, for only $750 more. And if you built it yourself it would completely negate the price increase at all.
However, I agree, it is a fast SSD with little to compare it to. But considering my base OS 10.9 + Apps takes up over 150GB on my laptop, I can't imagine it being functional to actually store projects on. And then you're back to using a RAID