My first modelling amp experience was through a red line6 UX2. I bought it because i wanted an audio interface AND the modelling technology. I don't know how they did it, but playing their software did modelling without any noticable latency while other amp sims did have latency related to buffer size. Anyway, i think it had the same models as the pod 2.0. Afterwards (and along the way i tried all software modellers) i moved to Pod HD which was fine for the time. Then I sold it and got an Eleven rack which has a way better "touch sensitivity" and feel to it. Then I had fractal's AX8 which IMHO is an AWESOME unit. Its a different league than anything i heard before. I sold it too early when i heared about FM3 which still isn't available here, and wish i didn't... Nowdays i use line 6's helix native, but as soon as I'll get the fm3 i am sure it will be the go to solution for me.