For a long time my favorite model was the 5153-red. After FW17 it became the 5153-blue. Now my favorite is the Friedman BE. I do still like the others, I just get the best sound out of whatever is my current favorite. I have definitely noticed that all of the amps just getting better on every new firmware release. So at some point will the Axe-FX2 sound better that a real tube amp???? Not being a fanboy, just telling it like it is.