One of the reasons I asked is if anything for a sanity check, and certainly would prefer not to make a sideways move at significant expense! I rarely get the itch but when it bites, it bites.
The two other areas outside amplifiers are to try a tube pre or add a pair of REL/Rythmic subs. There are many recommended options on the tube pre side that aren't crazy expensive and worth trying out at the very least to see how I like it.
The adventure continues.