I'm in Windows 7, have a couple 40g Intel SSDs, Intel i5-750 processor, and an ASUS P7P55D PRO LGA 1156 mobo.
I've never set up a RAID before, but it seemed easy to do through the BIOS, so I set up RAID 0 there.
Now I notice rozar's comment* that BIOS managed RAIDs are maybe far less efficient...