i use a 400+ plus with a 15/6+1 and while not powerful enough to push the cab to full utility I find the tone and voicing to be simply marvelous.
different strokes I guess.
I should clarify... If you are pushing the Mesa 400 or + into its full grindy, growly glory, and that's your thing, it probably sounds killer (i.e., when it starts to compress a bit and growl and grind). I was talking about a relatively clean tone at moderate volumes where those things can get a bit loose down low to my ear.
I recently played an old 400 through the tight and bright Mesa 610, and it sounded killer.
