First of all, thank you guys for all the help when I asked for suggestions on headphones. I just got the KRK KNS 8400s after literally hours spent looking at Innerfidelity graphs, and they are AMAZING. The detail. OH MY GOD THE DETAIL. Just wow. They're insanely clear as well. My source is a 4GB Indigo (<3) Clip+. There is absolutely no need for an amp. I'm listening to them as I type and I'm only at about 75% volume and they're at just the right volume. I can't handle any more than this. The isolation is INCREDIBLE. I literally cannot hear anything. At all. Well other than the incredible music of course. These are so good that I feel like I've literally rediscovered music. I'm about to see how it does with Bass I Love You and later on some COMFORTABLY NUMB! If you guys have any questions, feel free to ask. I recommend these HIGHLY btw. I paid $149 for them at Musicnextday (eBay) with next day free shipping. These are easily worth much more. Oh and the bass is certainly not lacking. It's not overemphasized though. Neutral bass, just the way I like it. Btw, much love to Tyll for those awesome graphs! Edit: Checked out Bass I Love You (FLAC). The bass extension is insane on these. All the bass in the song is clearly heard, that really deep (30hz?) rumble is perfectly audible. Very clean, very neutral.