Thank you all so much! Most of my music is at 320kbps, though some of it is substantially less. I'm in the process of upgrading that now, to FLAC where I can find it.

I don't really know what components I need to buy to get the most out of headphones. As of now, I have Sony MDR-V6's plugged into a 3.5mm jack on my speakers plugged into my computer's 3.5mm audio jack. I know many of you are probably cringing right now, as I don't have fancy headphone amps or...