SSD Cache + SSD RAID 0?

So I'm leaning towards building a new Z68 system since I haven't upgraded in a while and I'd like to be able to take advantage of QuickSync. Right now I'm running RAID0 with two OCZ Vertex 2 and will probably just move those over to the new build. Would I notice any gains if I also used another drive for caching? I'm not sure if the caching algorithms would speed up a fairly speedy RAID array anyway. Just a thought.