I wouls absolutely NOT get the 64GB non TITAN - those will have massive stuttering on write issues - even in RAID0.

About the only SSDs you can run without a RAID Ctlr card right now are the Intels, the TITANs, and the Vertex's (supposedly) which aren't out yet. I would'nt swap out a single VRaptor for a single Titan. Your write performance will really be struggling IMO.