I have a Solo 50 head and love it, I use 2 Avatar 2/12 cabinets.
The nice thing is that when you want to replace the tubes, you only have to replace 2 power-tubes, and you can use EL34's as well as 6L6's.
A lot of folks "slam" the front end with a tubescreamer/badmonkey/other OD pedal, but I've...