Never ending chase for new technology. :/
Btw, what amp has good synergy with J3?
Not really sure. Haven't tried pairing up my J3 with an amp. Pretty satisfied with the sound of it when paired with a pair of decent in ear monitors. Also I don't like lugging an amp around especially if I am listening to music while walking around...

. Practically treat it as none if you were to purchase online. Cowon's QC is good so dont worry.. no problems with my S9/J3 so far.