Here is 32GB MTRON MOBI vs Raptor.

That said if you are talking about getting 3 and using Raid 0 your bandwidth should be around ~280-300mb/s.

http://www.dvnation.com/benchmark-6.html

What really does it with SSD's imo is the access times, at 0.1 things really spring into action fast. Writes could be faster but again imo the access times more than make up for it.

Your Motherboard Raid setup should be fine with using 3.