I don't consider the Diavlo a 'Metal high gain amp'. Do you?Tbh I found most high gain amps I've owned to be quite inspiring.
Fryette stuff is amazing and was "home" for me for a better part of a decade. I had a Pittbull 50cl and a Sig x
Mesa Marks are legendary for a reason, loved me III and V
The ENGL Steve Morse was amazing and the mid matrix controls pushed it a step above many... I don't know why more amps don't have separate hi/lo mid controls. Scoop one for brutality and boost the other to maintain dominance in the mix.
I'm really enjoying the hell out of my current Rivera Duo 12 as well. Maybe not as high gain as some of these others, but wouldn'y have an issue playing any type of metal especially with a boost
Never owned a diezel, but have played through both a Diezel Einstein and Herbert and those produced some of my favorite high gain tones I've played
I never really gelled with my 5150s, probably user error on my part. Randall diavlo 45 I utterly hated