I fear that a Mad Professor amp may be the next step for me, as well... I'm totally happy with what I have, but... I guess I'll never know until I get one, right? Lol.
amps: Morgan AC20 Deluxe 1x12, brown Princeton, Silvertone 1482, Ampeg Gemini II, '63 Vox AC30, Harmony h430, Dr. Z Mini Z combo, Alamo Montclair... Etc...