Dunu hands down...
Better detail/resolution, more balanced sound signature, better control from upper mids to highs.
i have reviewed both so read both for a longer answer.
i realy like them both. they are different and while the dn1000 are the better they cost more so its really more about which sound sig you think will work best for you.
cant really go wrong with either though, both great and great value.
not heard the atrio but have the Wooduo 2 and given you mentioned those two i think your looking for mare bass than the DN-1000 offores. its got substantial bass but the atrio is a famous bass monster and the wooduo2 has colossal bass. i think maybe the 1000 isnt as bass heavy as you could be looking for.