rock solid enclosure, great cooling, low noise, 8 bays, support raid 50. this means your data will be a lot more safe. very fast speeds with u320 scsi.
the only problem is money. these things are not cheap.
so if money is a concern, i guess you can go with something like a rosewill esata enclosure...
http://www.newegg.ca/Product/Product...82E16816132015