I'm looking to pick up an external hard drive.

I think I want one that holds 500 GB across RAID 1 Mirroring (so 1 TB total).
It needs to run on a mac, and it should have firewire. If it doubled as a USB hub, that would be nice too.

I think the closest to what I'm looking for is:
http://www.amazon.com/Western-Digita...7277914&sr=1-6

Although the reviews say its insanely loud....

Anyone have any good recommendations?