I love my Brent Hinds Terror. Tube compliment is right from the factory, but it does benefit from swapping in Russian 6∏14∏ (6n14n/6p14p) EL-84's, the ones Ken Fischer and Dr. Z love.
With a single 90's UK V30 in an open back cab, cranked, it sounds like a goddamned Rectifier. Some King's X Dogman size Tabor toanz, really something.
Loop is legit too, cleans are great even though only has volume.
For quiet practice, the 1 watt / .5 watt "Bedroom" settings really deliver.
Cathode bias is just so cool for high gain sounds. You feel cranked no matter how loud you are, because the tubes always are.