The Hartke GT100 Half Stack has 100-Watts of power behind a 2-channel tube pre-amp for power to spare. I love everything about this amp, best feature is the channel foot switch.
All Hartke 2 Models
The Piggyback will blow the doors off a guitar rig twice its size. The amp is a compact 2-channel powerhouse with 60 Watts, 2-channels, a classic 12AX7 tube pre-amp section and tons of tone control.