Thanks Allan -- using a DAW sounds like a great suggestion for using more than one keyboard. In addition to my Genos, I have a MODX for those rare times when I want to play outside my house because my back can't handle lugging the Genos around. Also I have a Hammond SX1 with a pedalboard because I love the Leslie sounds but had to sell my B3 years ago. Currently I just like to sit down and play rather than spending much time fiddling with a computer, and I don't record what I play. That's why I was originally thinking of a MIDI interface and an audio mixer for output. But if a DAW can eliminate that hardware, that sounds like a better solution.