How loud is the XServe really?

I have all of my lab computers are in the basement racked and I've been using a PowerMac G4/Tiger Server as the hub of my home network. I'd like to expand my PowerMac's storage. The machine has been working well but I've noticed the prices on used XServe's have dropped to an amount I'm more comfortable with. I already have quite a bit of server grade hardware I use for playing around with, like a Compaq DL320, some DL380's and a few 1850r's or at work I've had exposure to some Dell PE 2300, 2650 and 1850 to name a few. They are definately not boxes you want in the same room with you for any extended amount to time. Can anyone compare it to something like that. I'm thinking it would be find in the basement but I'm concerned it might be too loud. When the house is dead silent in the middle of the night. A lot of the comments I've read by people feel like they are one's who never had any exposure to the noise of a normal server grade machine. thanks in advance, jeff