I'm thinking about making an SSD RAID in my Mac Pro. I know very little about SSD's, except there's 2 types, and they cost a lot. I read that Samsung is releasing a cheaper 256GB model sometime soon. Should I wait for that, or spring for another one? I currently have a 4 stripe RAID with some 500GB Sammy's, would I notice a difference running my OS and apps off a 2 stripe SSD RAID?