The nexus edge looks pretty good. It's got 8 x 5.25" bays plus 9 HDD bays. Assuming that you use 2 x 5-into-3 hotswap bays and you're looking at 19 hard drives. The Nexus Edge is also sound proofed. Cooling consists of one front 140mm fan, one rear 140mm fan, an additional (optional) rear 120mm fan and a top 140mm fan. Price is approx. £125.