I don't think I've heard the mids I'd optimally want yet so can't really answer that. A bit more lush mids than HP700, slightly more forward lower-mids compared to Q40, the cheap HTF600 also has fairly good midrange for my taste but lack of detail and a bit too smeared/lack of transparency.
I prefer giving up some soundstage size for forward/in-your-face mids, I absolutely despise midranges like say Denon D1100 and Beyer DT770 Pro where it sounds like all vocalists have a distance to them like sitting in the backrow seats in an opera house (in highend headphones the HD800, AKG K70x kind of presentation is NOT to my liking at all). The forward sounding midrange provides me an intimate & engaging experience which "moves" me, with a too distant sounding midrange I can't get involved into the music. I tend to prefer a bit more "fun" over "analytical", the intimacy, forwardness goes before transparency & microdetail in my book.
I realize it's hard to get both a bassy and forward midrange at the same time but some bassy headphones do it better than others though and I tend to look more at the midrange and highrange and compare the forwardness of those against each other. I don't want the highs to push the midrange back, I rather take a bit more forward mids over slightly recessed highs than the other way around.
I have a feeling UE6000 might be more fit for me altough the bass response worries me, I'd really want to keep roughly similar amount as M-Audio Q40 as this headphone has roughly the ideal amount of bass for my taste.
