I'm finding that the AX8/II has stabilized (or possibly one last update) is....awesome. I'm very much looking forward to developing my tones and exploring further on a platform that isn't changing every few weeks/months and requiring re-tweaks, sometimes from scratch.
Don't get me wrong, I loved the constant firmware updates as they always brought tangible improvements to amp modeling for me, but have to admit that a platform that is 'frozen' is liberating in many ways. The last Quantum 9.04 update, which made a huge leap in amp/cabinet interaction, is doing it for me, big time. I'm good to go until the next-gen floorboard/Ares equipped Fractal device hits the streets.
I cannot deny that I'd loooooove an AXIII with Ares modeling and watching/hearing it blossom and unfold over time and being a participant in all of that awesomeness, but, again, I'm a pretty happy camper with 9.04 and it's maturity.