Let's say I'm impressed by OS/X server. And I really like the Rumpus FTP server. And setting up and email forwarding box is so damn simple I don't mind paying the $1,000 for the priviledge. Waht OS/X hardware should I get? I'm looking to put it in my server room and call it "enterprise". This means rackmount is probably a good idea, along with mirroed disks.