Looking at this again...
Palmer speaker simulator stuff is about half the price of the ISO cabs.
The Axe trak, not sure, but i know mike had/has one?
The Randall one, yes, noiser, but can add microphones and switch out the speaker?
Or is it just best to build on of the buggers?
I've never used an isolation cab, but I've heard the Palmer in real life and it sounds very good.