Donny, thanks for starting this thread. I'm now going to keep my MicroArranger instead of buying a PA500. I'm so used to playing and enjoying my S910 that I don't think I will replace it after all. The PA500 would not give me any more sound versatility than I already have. As a matter of fact, I'm going to experiment using my XK1 with the KMA and maybe alternate rigs instead of looking for something new or different. Thanks for saving me $1000 or more.