If you're using a dedicated RAID controller, you should be fine... the problem lies in using motherboard RAID
Just keep in mind that RAID can be somewhat tricky... my friend and my brother both had RAID setups in their machines, and both ended up losing them...
my friend had a fried HD... my brother had a corrupted OS installation and had to reformat... he is using RAID again, but this time the OS has it's own drive
But I imagine you should be fine leaving the RAID drives just for FS... there being no OS in there to mess it up... I don't see why it should work

Good luck on that... I wish I could get VRaptors for myself