Roland Cube 100. The tone is slightly less refined than the G-K MB combo, and it's bigger, but it's also louder and sounds great in its own right. I think it's exactly what you want, but the newer SWR WorkingPro combos are worth considering. I've been impressed by the 1x12".
"Ignorance is common, but in a learning environment it cannot be tolerated as a permanent condition." Beverly Daniel Tatum, President of Spelman College.