Why run SSDs in RAID0? It just double's your chance of a failure and SSDs are so fast it's really not needed. I think you'd be better off just buying a larger SSD.... A larger SSD might even actually outperform two smaller ones in some cases
Not necessarily true, but a good point. I agree with the OP.
The OP mobo doesn't have native SATA III support, so that's why he wants a RAID card.
Check out rozz tip.
That board you listed is a X79 board, expensive! ANd a LGA2011 CPU board, very expensive!
You'll have no luck finding a SATA III native X58 board. These start with Z68, which is LGA1155 CPU.
You like Asus, so the Asus P8Z68-V Pro/Gen 3 board would do you good. Then you'd need a CPU (i5 2599K or i7 2600K), and RAM (8GB DDR3-1600 Corsair Vengence kit (2x4GB)).
Anyway, we are getting way over your original post dollar limit.
Cheers.