I've used the HEXv2 with iFi Nano Black Label and Micro Black Label, Chord Mojo, just a Fiio A5 amplifier, Modi2/Magni3, and Modi Multibit/Magni3. People in the HEX thread and elsewhere describe it as laid-back and relaxed, I think soft is a more direct word for it. The sound is generally softer than many other headphones, which is one thing I think the AFO might pretty much nail right. Depending on what you want it can be dissatisfying. Why are you not considering the Sennheiser HD800 or 800S? Should be the king of soundstage and while I've read the mids could be recessed generally I don't see complaints about mids, though I don't see much mentioning of mids at all.