Rob 1

First of all, RAID 0 is not redundant, therefore it is not a true RAID array.
Which is why the os may be toast.
(hopefully someone can offer a fix here)

But my advice here is to suggest to you that RAID 0 is really not that fast either, for all the risks involved.
You would do better to run a RAID 1 or better.
With those Raptors, you wouldn't notice much of a difference anyway.

The fact of the matter is that system memory is roughly 100,000 times faster than hard drives.
(nanoseconds vs milliseconds)
So no matter how much improvement you could squeeze out of your hard drive,
it would still be the bottleneck to your memory.
The best bet is to make sure you have as much system memory as you need.