I had a Kustom Groove 310C Groove combo. It was beastly. Sounded great, and the loudest amp I've ever played. It was also very heavy, and getting it up and down stone steps, the fact that I annoyed sound-people, and the fact that it really just wanted to be so effing loud, were the reasons I sold it.
I kinda wish I had it now though. It would be the right stuff for my stoner/doom band.