What cheap dacs are there with volume controls?

I say check out the Grant Fidelity DAC-09 or DAC-11 tube dacs. Both have volume controls. I currently use the DAC-09 with a GE tube in place of the stock one and the sound is quite pleasant.

If you don't like tubes try the Cambridge Audio Dacmagic with the new Pangea P100 power supply. I have that combo in a headphone set-up and I'm really happy with it.

Sfar is right the CA Dacmagic does not have volume control so it won't fit Systembuilder's requirements. My mistake. It is a really nice sounding DAC though IMO with the Pangea P100 PS.