it's all subjective to the personal tastes of each player...I had a Mesa 4x10, and what a crock of crap it was. My Marshall 4x10 blew it away. However I can play a 5 string banjo with 2 missing strings through a tomato soup can and hold my own, so you never know...
You should play any used cab at a pretty good volume on your clean channel to really hear for any imperfections. Switching between distorted and clean, if it sounds good without any rasp or farting, like the Mesa crap is known for, then you have a decent cab to buy.
The true test will come over time to see how it performs for you...Good luck!
