Currently recording a new album for my thrash metal band DeadHead with your JCM800 2205 profile. I replaced the cab with Till's 4x12 Greenbacks. Use the Kempers Green Scream (drive:0, Tone:2,4) but without also sounds great. Dipped some 200 and 450 hrz with eq.
I have a Peavey tube power amp + Mesa 4x12 V30, which sounds the same as playing over my studiomonitors, side by side.
Oh, and this jcm800 profile is the most quiet compared to all the other commercial and free jcm800 profiles. (I've tried 100+ for the new album).