I've had my D2ks burning in with pink noise for about 40 hours now and... wow. These cans are SUPERB, definitely living up to the hype. If they are supposed to get even better with more burn-in, then I'm stoked! I'm running them off of my higher end Denon AVR. I'm wondering if it's putting out enough juice. I know these cans require very little power but since there's next to nothing known about the headphone stage of the Denon AVRs I'm wondering if they can sound even better with a good dedicated amp. It has a 24/192 Burr-Brown DAC so I'm pretty sure my DAC is up to par.