The wide body cabinet on the Mark V adds some depth to the tone. Takes out the boxy character of a smaller sized combo. Also adds to the character for the clean channel in terms of acoustic clarity. I am hoping I will be pleased with the MC90 I ordered from Mesa arrives. I have my reason why I converted my Mark V from head to combo.
However, I have no experience using the Mark V combo in a band setting, closest I came was trying out the Mark V combo at GC before they stopped carrying the product. I was not playing the amp loud enough to hear it over the others making noise. The Mark III combo on the other hand, have plenty of experience with that in a band setting, I was able to drown out the bass and acoustic drum kit if so desired, but that had the black shadow EVM12L in it. That was one amazing little combo. Probably should have kept it. The Mark IV just did not have the right tone to mate with the MC90. I have killed more speakers with that amp. One reason why I sold it.