Being a VHT fan boy, I have to go with the Ultralead. Seriously, there isnt a sound that thing CAN'T replicate if you what you are doing with the graphic EQ, and most importantly ARE A GOOD MUSICIAN. The effects loop is perfect, all 3 channels are completely usable, boost, functions, EQ shifts that do wonders, The gain is completley usable all the way through the spectrum,THE PERFECT live amp....I could go on and on,but to me, they are just exceptional. The Bogner xtc, and Mark IV also get a nod from me in the " All around exceptional amp" award, especially the xtc. While the mark IV is more my style, I feel for what the xtc does, it can't be beat for the quality tones that thing produces.