#1
What brand of tube would be the best for hot-rodding a marshall head.
Framus Cobra
Marshall JCM 900
peavey 5150

Mesa 4x12
#3
^ yeah and if you wanna go extreme you can get a Soldano Hot Mod to add a whole extra gain stage.

TAD E83CC 7025 Hi-grade on my LAney VH100R is very high gain as well.
Gear:
Gibson SG '61 RI
Fender MIJ 62RI Tele
PRS Singlecut SE
Epiphone Sheraton II
Ibanez AEG10NT
Orange Rocker 30
Blackstar HT5C