I have the RAID setup with 2 45 gig IBM 75GXP's. It it is true that setting it all up is a little more work, and one the drives are in, you cannot relocate one into another computer, but MAN O MAN is it FASTER.
I had my issues with booting and installing win 2000 on the RAID, but for the most part I love this board. I have 2 sitting here. Just never by them from Frye's. They are a rip off: $175 !!!
Good deal, does he have any more? =)