i love my barber direct drive super sport....
that said, what i'm finding i'm using more and more, and alone, is my fulltone fatboost III pedal.
it just gives you MORE of whatever you got going on.
any good clean boost will work.....
i happen to like the fulltone stuff.
barber has one too, but i've never used it.
unless you just WANT distortion......
on top of how ever hot you run your amp...
i've found that putting a good tube amp, into that 'crunch mode'... and then adding a big boost on top of that...
helps retain the original quality, but adds sustain, drive, and depending on the model you have, treble and /or bass cut or boost....