Yes, I have to agree the A4000T is a miserable thing to open. I never understood why they had the PSU mounted (riveted no less) a few inches from the top of the case. Waste of space. It looks big, but its actually not the sort of case you could readily stuff with drives. Its also no fun having to remove the front bezel to slide the drive chassis out if you want to get at the CPU daughterboard.
Nonetheless you gotta love the big lump :-)