I have both axe fxII and a kemper toaster...the axe sits in my studio and the toaster i easily carry from my home to my rehearsial place and to gigs. If i had to sell one of them i would sell my axe. Its so easy to go from places to places with my toaster and soundwise i cant say anyone is better. Im a lazy person and i dont have power to sit several hours to find the best sound for my axe. Maybe i could find a slightly better sound with the axe if i had that power. But anyway i would just see difference if i sit with my self, with no band or not recording any song. i dont know about the axe fxIII, but the mobilewise option is still much better with a toaster...this is only my opinion
Hope you find your own sollution so you can sleep again
I dont need to sell my axe fxII anyway so ill keep it. Its a fantastic piece of gear too