i could maybe see that- the mesas have good tones, but can tend to be more wallpaper-y sounding, without a huge mid-range presence like marshall & other amps. is that what you mean avi?
in that respect, if josh doesn't necessarily like the midrange of the 5150, maybe that sound is more what he's looking for?
i never played a 5150 where i could listen to it, just at fests.