So the raid 0 7200s are faster than the raptor? Hmm.
I have two raptors in raid 0, that I use for my C drive. And all the programs like photoshop, front page, illustrator, etc.
My attitude towards raid 0 is this: You are going to lose the data. Maybe not today, maybe not tomorrow, but you will lose it. It may sound counter intuitive, but the C drive just isn't that important to me. I can always reinstall windows. But you can be goddamn sure I put my lossless music elsewhere.
I guess you're ok since you have a backup of it.
For me, my music is whats important, and for that, I keep backups of my backups