i think ghdprentice is right.
The synergy headphone /amplifier was very hard to reach for my K340...
I dont doubt his choice for driving headphone picking the last model of Woo...
It is out of my budget as are High end known headphone...
I am lucky because the K340 was AKG flagship and with a unique design...
The only amp i use with it is one of the Sansui alpha one of the best amplifier ever designed by the Sansui company before his death ...