So basically, I have the following amps; Soldano SLO KT66's, no mods, Mesa triple Rec Reborn JJ KT66's, Diezel VH4 Winged C 6550's and A Rivera Knuckle Head Tre JJ EL34.
I mostly play at home and occasionally go to mhenson42's house for a micro amp fest and beer!
All my guitars (Gibson Les Paul Standard/Traditional/Suhr Antique Classic) are tuned down, C standard and B standard etc. After being fortunate enough to play through most of the renowned Cabs out there, if you can name it, its been played through, except for a newer German made Diezel front loaded cab. I like a really heavy, percussive clear and tight sound. Sometimes boosted with a Suhr Koko Boost pedal. I guess i'm going for that Adam Jones, Chevelle, Staind kinda sound. Anyways, the Mills can and will stand up to anything u a can throw at it. They are probably too heavy for a regular gigging musician unless you got some cool band mates to help out. The only reason they sound so friggin awesome is that they are huge. To my ears, after doing a blind tone test with a Bogner rear loaded Uber cab V30 and a rear loaded Diezel cab V30-G12K100 x-pattern IIRC, even blind you can tell the Mills part. It basically "hung" in there against the 2 cabs vs the one. However, if you are playing out and are going to be miked up, I feel its a moot point or at least thats my experience. I was in a band a few years back and played a couple of local shows and i always used the other guitarists beat Marshall cab, V30's with my Mesa triple rec. Worked well and you're at the mercy of the sound man.
Hope that helps and feel free to ask more if you want.