My new Mesa 400+ just arrived the other day, and after one practice with it I've decided that I'm in love. This amp just plain rocks! It's exactly what I've been looking for! Tons of volume, awesome tone from clean to dirty, not too heavy, looks cool as hell, and for the icing on the cake, was brand new in unopened box for the price of a used one! The only thing that I don't like is the fact that when I tried to remove the top of the case to access the tubes easier (to remove their protective plastic webbing) 3 of the damn screws were on so incredibly tight that they stripped. It's going to be fun when I have to take it in for any servicing. I can't wait to hear how this thing will sound with JJ's in it. Thanks for all the great info guys! I think this'll be the amp for me for a long, long time.