Multi-input, Volume controlable DAC?

I'm looking for a multi-input DAC that I can control volume with. I'm thinking of a Wadia 15, but am looking for other options. (Wadia 12 would fit the bill too!)

This is for my office system. I'll be streaming from my computer to a Airport Express that will output TOS Link for one input, and Coax out of a Rega Planet on another. I have a Conrad Johnson MV50 that I can power a couple of Proacs with.

Any ideas, or is Wadia pretty much where I'm going to end up?