Hey JR,
Regarding clean boost for channel 2, If you try it you might really like it.
Smacking the preamp tubes with a boosted signal will give up a wonderful tone. I have an an old DOD SS boost/eq pedal and it sounds great, love using the eq sliders to shape the tone. It gives me the "amp is about to blow up" sound with lots of sustain. Nice note definition, more howl, less fizzy. My boss at work uses a Klon Centaur clean boost, and he swears by it.
One boutique clean boost pedal that uses a tube, Siegmund's Missing Link, is interesting. His pedals use subminiature military tubes that are long lasting and sound great. I have one of his Double Drive tube distortion pedals, it is a great way to do either two or three gain stages of clean boost and/or distortion. That pedal has a variac in the power supply...and that changes the way that the pedal responds to inputs significantly.
Please accept my compliments on your voicing your amp...awesome! Isn't it wonderfully satisfying?