Yeah, the M6U hits way above its weight, and is only let down by a lack of accessories and an included case really. The DX240 sounds awesome and it's light, but I can't stand the software, or the included case.
Headphone Reviews and Discussion - Head-Fi.org
Shanling struck gold with M6U. I didn't realise how great the M6U is until both it and my G5 were out of battery at the same time, and I had to switch back to a bluetooth dongle. Somehow that dongle manages to suck the life out of both Andromeda and EA Gaea.