Going back to one of the cans you asked to compare, the md3.2 beats the k701 on depth by a lot. This will make vocals appear more distant, not hollow, though. If that's fine by you and your tastes, the 3.2 vs 701 driven by a: a neutral bus powered audio interface with weak power, fiio e11, and fiio x3 resulted with the md still winning in depth, despite not being driven as well. The md is a much better investment if you plan to one day upgrade your source.
Have you considered the vmoda m100 since you're in this price range? I own the m80, but i suggest checking out the new xs as well if you're okay with on ear. Might be right up your alley, based on some of the feedback.