I use this funny-looking 4 x TDA1543 DAC directly driving DT880 600 ohm for 100% of the time in home:

and mine Breeze Audio E4 is on the pipeline, because of little lack of control over the headphones (these DACs give only 8 mA) and problems with more complex recordings.
FiiO E9 (stock, unmodified) had its chance to run with it (and with other DACs and CDs I have), but had lost it, few other amps win over it, and this JFET/MOSFET based discrete "Breeze Audio E4" was clearly the best - difference was really huge (like high-end vs hi-fi).
Edited by borizm - 12/23/11 at 1:16am