Yes, I’d still prefer a IIB over a III. My comment was based on the before/after comparison of modding that particular amp. It was still real good after modding, but I felt it was better before modding. Thats where the regret comment came in. I’ve modded quite a few Mark amps, with varying degrees of success. Some have turned out stellar, while a few cases did not. so, Lesson learned by me: if it sounds great as-is, don’t mess with it.
Give the amp a test run. It may be just what you’re looking for, or, maybe not. As for greenbacks, I‘ve tried higher-power variants, but revert back to EVM’s - the amp was made around those, IMHO.
Regarding the price - it seems a bit steep, but is a hardwood, full-featured model with nice glass. You could probably part it out and recover over $1K. Or, if you think you really want a III, there’s a hardwood blue stripe that popped up on reverb with local pick up in NJ (not sure where you’re at?) for considerably less. Good luck…