No rack mounting, just sit on the floor. I have the Antec SOHO case already, I'm looking for something a little bit more solid. Some of my requirements: room for 6-8 hard drives, floppy, cd-rom, and possibly a back-up tape drive (so 2 external 5.25" slots, and 1 external 3.5"), good cooling and not just for the mobo/cpu but also for the hard drives in the front, all intake fans should have a filter on them to prevent dust from going in, and security to prevent people from opening it up without a key. Actually what I don't like about that case is the fact that the power and reset buttons are out in the open, I'd much rather have them behind a door that I can lock, but that's a minor issue. So basically a case with good cooling, good physical security, and plenty of space.
That case above is probably the only thing I could find that comes close to those specs. If you have any more suggestions, please let me know.