Hi guys, I recently became interested in appreciating music as opposed to listening to my Ipod out of the default Apple earbuds. I've done some reading but still have lots to learn, so please bear with me and pardon my silly questions. I started out with the AT M-50s after reading rave reviews and was indeed blown away by them connected straight to my laptop (Alienware M15x, not sure of the sound card). After hearing those, I was hooked and became curious about the other choices out there and thus came the slipper slope... After reading up on the Denon D2ks and seeing them regarded as one of the mid-range headphones which would sound acceptable without an amp, I decided to go for it since I had not intended on getting an amp. The D2Ks arrived 2 days ago and I've had them on non-stop to do break them in as fast as possible. They feel to be a step up from the M-50s in just about every way except for the recessed midrange. I had read that they had a U-shaped frequency curve but had not expected this much of a dip in the midrange. For example, in songs by Adele she sounds as if she's at the very back of the stage with the piano accompaniment actually positioned much closer to the mic. Since I listen to a lot of pop and stuff with vocals, the recessed midrange is seeming like a big issue. I have the FiiO E7s on the way and am wondering how big of a difference they will make in terms of improving the D2Ks? Since I had to get an amp for these, I started looking into the Beyerdynamics that I had initially been avoiding. Since the DT 880 Premiums seem to be relatively neutral with a more prominent midrange than the D2Ks, I have the 250 ohm version on their way. The general consensus seems to be that the FiiO E7s cannot adequately power the DT 880s and that a tube amp is recommended. Without getting a tube amp, how will the DT 880s sound relative to the D2Ks with just the Fiio E7? How about the E7/E9 combo? Thanks for everyone who took the time to read the huge wall of text. For those who couldn't be bothered, here are the clifs: -Disappointed with the recessed midrange of the Denon D2000s (vocalists sound too far away from the mic and seem to be overpowered by instrumental accompaniments) -Have FiiO E7 as well as Beyerdynamic DT 880/250 ohm on the way. How much of an improvement will I see in the D2Ks with the E7? -How will DT 880/250 sound with just the E7 relative to the D2K? What about with the E7/E9 combo? *No tube amp Thanks again.