http://www.enhance-tech.com/products/desktop/t8_ip.html
We've got these on three sites now (well, one's a rack-mount version), 8x1TB, setup as RAID5 for 6.5TB available. These things are the shit. Hardware RAID5 is great - good performance, and data redundancy: if a drive dies, you just hot-swap it, and the system rebuilds the array automatically.