Okay, I play in a cover band doing a wide range of songs. I play a Mesa F-50 head in a 2x12 closed cab and I use the overdrive on the Mesa for harder rock songs. I have been using a Boss Turbo Distortion set low for some of my more classic and 80's rock sounds but I think I could do better. I plan to buy used and don't want to spend too much on this. Does anyone have any suggestions?