Things I use frequently: Stax SRM-252II, Stax SR-202, Ultrasone HFI-780, Cowon S9 8GB, Koss KSC-75, AudioEngine A2 (ADS1 desktop stands coming soon to get rid of boxiness), X-Fi (out to) E-MU 0404 USB, [laptop integrated audio] Others: Sennheiser HD-650, Koss KSC-35 (ear pads are torn up), AKG K501, Sennheiser HD595, Sennheiser PX100, JVC HA-RX700, Grado SR225, Beyerdynamic DT 770 Pro (80 ohm), AKG K701, AKG K81DJ, Etymotic ER-4P, WooAudio6, FiiO E5, HeadRoom Total AirHead, iPod shuffle, Creative Zen V Plus, LiTe DAC-AH, AudioEngine A2, those cheap Insignia speakers that were popular a while back Returned, but planning to rebuy (I miss the PERFECT bass): Denon AH-D7000