On SSD, before taking a jump in that direction, please research some of the corner-case support issues some have encountered with it:
I've personally heard fantastic things about Storage Spaces Direct in regards to performance, but I think there are support issues that still need to be honed out. You just don't encounter the same scale of problems with other solutions out of the gate.
On the all-flash side, I've been incredibly impressed with the NetApp AFF-series. I'm playing around with the A200 right now and its been awesome. Performance hit from inline compression and dedupe isn't that bad either.