I just picked up a Mesa Quad from auction and I'm thinking of getting a Voodoo Amps modded Marshall JMP-1 to run in conjunction using a GCX router. I'd like to run them through a single power amp by switching which one the signal is routed through. For the amp I am looking at the Mesa 20/20. Any problems forseen in using a JMP-1 through a Mesa 20/20. Any other suggestions for decent low wattage tube power amps??