I currently purchased the 4-bay hardware raid enclosure for my studio and I'm looking for suitable and reliable hard drives for my RAID 5 setup. **http://eshop.macsales.com/item/MISC/0G033S2TB0GB/ <--this is what I purchased, the G-Technology enclosure. I'll be using this hardware raid unit for my on-site audio data backup and sample libraries steaming (not going to stream heavy duty libraries from this RAID set, I already have couple SSDs for that task). I'm looking at both NAS drives and Enterprise drives from WD and HGST, drive performance isn't my primary concern here, I'm more concerning about the drives' reliability for operating at least 12 hours a day. For now, I'm aiming for 4TB drive capacity. Should I go for the NAS drives (currently looking at the HGST NAS or WD Red) or pay a premium for the enterprise grade drives (like HGST Ultrastar or WD RE)?