volume pedal

Hello everybody. I'm new to the forum and.... well, here's the situation: I'm thinking about ordering an Asher dual tone (electric weissenborn with two outputs, stand. lap-steel and accoustic) and wondering which volume pedal that would be ideal. Both pick-ups are passive, and one goes to the amp, and the other goes to the P.A. Instead of ending up with two pedals, a stereo pedal seems like a sollution??? There are several stereo pedals from Ernie Ball, but which of them should be the perfect match??