I owned or demoed extensively most DAPs in the past three years (including dx100) and currently own dx90, ak240, and hm901.
Imho sound wise as a standalone DAP hm901+balanced amp is the best. Better than the ak240 on balanced for most if not all of my phones.
The tradeoffs are size/slightly shorter battery, plastic appearance/built/finish, 100% functional but spartan UI that is best used with folder browsing only, and fine volume control is not possible with the stepped attenuater. If none of these are deal breakers then please join us!
Edited by kkcc - 6/6/14 at 7:33pm