Most of the antecs and chieftecs at which I have looked have crappy plastic fan holding things that rattle on the Antec which I own now, and removing them introduces complications.
What complications? That you have to drill mounting holes for the fans? Big deal. If you're going to cut out the grills any way just drill new holes at the same time. It's a great idea to get rid of those plastic fan holders anyway, they're noisy. Drill a new set of mounting holes and use those elastomer fan mounts and you'll have a much quieter setup.
The reason I didn't reply to this post yesterday was that you specced it out to include "a minimum of 7 expansion slots" which I took to mean 7 PCI slots. I don't know of a motherboard or case that has over 6 slots so I didn't comment. Do you really need 7 PCI slots or did you mean something else?