I currently have 10 HDD's and 4 SSD's plus 2 - hot swap HDD's in my case. I use and Antec 1200 with a 4th factory cage installed. The SSD's are in racks that mount in expansion card slots.
The case has been great, very well built, awesome at keeping everything cool during parity checks (except SSD's), but my only functional issue is it's a PITA to change out any drive. Opening the case is one thing, but you have to remove both side covers, completely unplug fans and 3 drives, then