There's another thread about using the Kemper for Harmonica which is interesting, but I think with Sax there's a different dynamic since harmonica players use the amp to give coloration to the sound, while sax players want as clean an amp sound as possible to be able to generate tone from the horn itself.
I double (actually triple counting flute and this discussion would be relevant for that as well) on sax and guitar. I've been using the Kemper for guitar for the past year and it's been a revelation. Like most of us, I love tube amps, but - at least in my case - hauling around a decent tube amp has become more and more difficult with age.
That said, one of the other things I love about the Kemper is all the awesome effects that are at your fingertips. I'm lusting for some of those effects to be available for my tenor and soprano saxophones. So, my two part question is, is anybody else doing this? And, whether or not, is this something that I should even think about doing? I'd never think of playing my sax through a real tube amp - too much coloration, but I can imagine a rig that is so clean that sax would sound great through it. I haven't found it yet, but I'm throwing the question up to see if anybody can give an informed opinion.