I would recommend some enterprise SSDs from Samsung. Do not buy cheap SSDs, that's normally only crap for CEPH. Put in some more money and you will save this later.
If i'm not mistaking, you're talking about Sandisk IoMemory. They should be crazy fast.
I use the previous generation of Fusion-Io and i get 1-1.5GBps RW and around 200k IOPS.
So it should be very good.