Is there a way you can put two SSDs in Raid 0 (both 32 gb at SATA 3) and then use the combined drive as a ssd cache? If this is possible, will it be possible with this SSD? http://www.newegg.com/Product/Product.aspx?Item=N82E168... There is also an Adata ssd, but I'm not familar with Adata. Is Adata reliable?
From a cache stand point, raiding the cache drives would actually slow you down over a single larger ssd. By raiding you gain sequential transfer rates (almost double) but lose access time which is what you want your cache to have.