Just finished a reamping job for a Guns n Roses style band.
I profiled the 2 sounds used.
Single channel JCM 800 from 1986 with SD-1 boost and Mesa Mark V in MarkIIC+ mode.
Both going to Marshall Mode 4 cab with Vintage 30.
This cab had 4 K-100s but I swapped 2 Vintage 30s in the top and it sounds great.
SM57 to Aurora Audio GTQ2.
Using these left and right should give a killer G'nR sound. (Slash Marshall and Izzy Mesa Mark)