Noisy external drives

I have always had a very noisy externa LaCie 1TB drive, so noisy that basically I put it on, transfer the files and turn it off.

I have been using an external Iomega 1TB drive recently and though it is much much quieter (I can certainly leave it on) it is still very noisy.

I do have a couple of external 40GB LaCie host powered drives and these are very quiet.

So what I am trying to find is a quiet drive, but a large quiet drive, at least 1TB in size, though 500GB would be fine as well.

Any suggestions?