Oh, by the way, Geoff. Correct me if I am wrong. But, I beleive HP or Dell will set up your RAID and install the OS for you. You would still have to run the wizards to set up your users, etc.
I have put this on here before, but if you at least want to get an understanding of SBS 2003 or Windows Server 2003 or just about any OS or AC or whatever, get the TrainSignal DVDs. They are awesome. Much better than reading a book. I still use them when I set up an OS.