I love this topic.
I have two Tremoverbs and I do NOT play metal...not good enough, I am a hack!
I will say this, intensity within a song can come from many places such as tone or chord phrasing.
Think of Wagner and how intense his arrangements are with regards to instrument assignment and and phrasing within those assignments, for example he is famous for intense horn passages, while Korsakov's use of string arrangements provide his idea of intense passages within a piece of music.
For those of you unfamiliar with the aforementioned examples, think of King Crimson's Robert Fripp on the album Thrack and listen to Vroom on tracks 1, 14 and 15.
So I guess what I am trying to say is that I too have reduced gain by tube rolling (still not done, thinking about some 5751s) and totally backing off the gain level in my Red Channel.
I have opted to get a BB-AT, RC-Comp and an RC Booster.
I love these pedals and the varying degree of gain.
If I need a little more sustain from my Red Channel I just add the RC.
I have EQ'd the front of the amp with a 5db boost to 1KHz.
I have also EQ'd the amp in the FXLoop with my GMajor, where I reduce 200Hz and bump 100Hz and bump 800Hz.
The amps sound killer, clean and very responsive to all types of music.
I have always thought this, but have now really taken advantage of the EQ'ing benefits and the low gain boost pedals in front.
Love these amps and do NOT at all think they are metal, thrash, trash, punk only, but instead an excellent all purpose amp that are easily capable of MANY genres...at least my Tremoverbs are...I have no experience with other Single, Dual or Triple Rectifiers.
Also, in closing I truly believe the best cabinet for my amps are the Stiletto 4x12.
You want a tight, percussive, articulate cabinet that is not overly heavy on low end, unless of course you need that type of sound.
The only improvement might be an x pattern using the V30s and the G12H-30s.
Just a hacks two cents.