trivium911
500+ Head-Fier
have you thought about the oppo ha-2? they sound great with the HD600's. i find that at the highest volume sometimes i want a bit more. but i like to listen loud. most people are pretty content with the HA-2 and 600's pairing.
So expensive though even more so than the JDS labs C5D. I Should mention im in Canada so everything in american prices is jacked up right now due to the low dollar. My fiio X1 was around $150 (this is currently what im stacking the q1 with). I really like the sennhesier 598's and could imagine the 600's are even better...primary listening with these headphones is artist's like Yanni and Nico instrumental stuff perhaps some jazz and some heavy metal type music (Lol i know im messed up to listen to opposite spectrum's of music). I think with the bass boost the q1 currently offers for the music i listen to is sounds perfect.