Wireless and USB dacs

Hi guys, I recently bought a Bel Canto integrated amp that has a built-in USB dac. I'm interested in sending it audio from a PC in another room. Is there a squeezbox-type device that has a USB output for the digital audio stream? Or maybe there is some other way to do this without using a PC/laptop in the same room as the stereo system?

I do have an old laptop that I hooked up directly to the amp with a USB cable but the laptop is very noisy - not fan noise, but high-pitched electrical/mechanical noise - plus it's really slow and is just a general pain in the arss (Windows 2000). Obviously I could get a mac mini or newer laptop but would prefer a cheaper solution.

Thanks in advance!
Analogkid