You're probably not going to find one with 2.5" drive bays, but rather 3.5" drive bays, which will probably fit the 2.5" drives without any problems. Although, these are normally cases designed for servers and are typically rack-mounted and expensive.
I've been looking for something with a sizeable number of 3.5" hot-swap drive bays with ATX support and proper cooling for the drives. Silverstone's DS380 is close, but it only supports Mini-ITX, and I wouldn't mind more than 8 hot swap bays since I like leaving space between drives.