I bought my kemper powerhead 10 days ago. I had been following the ax-8 and helix build up but decided on the Kemper for a few reasons. The concept and execution of the profiling itself is nothing short of astounding. Although my experience with it so far has been limited to using it with a 4 x 12 1960a cabinet, some of the tones i have dialled in are unlike anything i have heard before from any digital gear. My background with regards to gear has always been tube amps, marshalls excusively. I have been through many jmp's, jcm 800's, 900's, monoblocks's and more recently the jvm. I wanted to buy something that i would keep for years to come and I cannot see whay that isnt possible with the kemper. I needed a power amp too so the Kemper was a no brainer. The other guitarist in my band uses the original Axe fx and it is a gorgeous souning piece of gear..some of the clean tones are unreal. His gain tones are equally impressive and cut through the mix very well, however I wanted something more authentic and the Kemper ticks all the boxes. The 5150 tone I am using for my rhythm channel is jaw dropping. I think fractal have priced the ax-8 brilliantly, it will sell an astonishing number of units and will be commonplace on stages everywhere. Still have no regrets on the kemper though. It simply sounds killer.