I'd recommend staying away from NetGear, to be honest... very quirky. I've some SC101 units, and find them reliable enough... but if a drive fails you've literally got to start from scratch... a broken mirror won't rebuild, and the drives don't hot swap. They use a weird file system called 'Z-San' which isn't compatible with... anything!

Try the LG-N2R1D (from Scan in Horwich) - it includes a CDRom and USB, and the SATA HDDs are hot swappable... come and look at mine first, if you prefer.

There are two SATA bays, each will take up to 1Tb, and there are a few RAID choices.

There is another version with Blu-Ray instead of DVD, slightly more expensive.

Excellent build quality, and FTP access is also possible, though I haven't bothered yet.