You know, How's about selling the plinius and getting a better integrated instead?
Say a Electrocompaniet ECi 5 (2x120w, 80 amps of current power) should do well on the chosen style of music there.
Or of course, a dedicated AW 2x120-M Dual Mono Power Amp (Has a somewhat more tight bass than the AW 120) and then adding the EC 4.8 (pre-amp) later would also be a suggestion from me. The AW 2x120-M can also be made into a monoblock by pushing a button, hence one can add one more later, giving then ca 2x400w.
This is serious stuff for vocal and jazz on a SF! Interlink suggestion would be also a Norwegian brand called black magic between
EC components. Tighter still can be had by using say Nordost Red Dawn interconnects, using say Nordost TYR will give
more transparency and more glow to the sound - more warmth.
Garret H, from Soundstage has recently tested PBN Audio gear on a SF Grand Piano and thinks it to be the cat's meow... as a side note here.
He could very well be right about that, it would be ever so slightly more lean than a EC setup as per noted.
Imperial