"low volume" is not really how I should have said it.Super Compact or Super Compact T for sure.
If you only do low volume stuff, the SMT would probably be fine, but won't have the thickness in the low end like the SC(T).
I've heard SM users say that when really pushing a lot of power through it, it started to sound a bit compressed, boxy, less natural in its tone.
That could probably be alleviated somewhat with judicious use of an adjustable HPF &/or adding a second SM.