The number of accurate posts in this thread restored my faith in lots of things. Thank you all.
Some good headphone options:
AIAIAI TMA-1 - I have had them for two years and I love them dearly.
Pioneer HDJ-1500 - heavy as fuck but they sound great
Sennheiser HD25-1 II - the DJ standard. Lightweight, durable, foldable, awesome-sounding, and the parts are individually replaceable.
Sol Republic Tracks HD - Not superbly comfortable and as far as I can tell not extremely well-built, but they actually sound incredible given their price point. Best bang for the buck of anything I've ever heard.
And remember, every time someone buys a pair of Beats By Dre, Dr. Dre finds a young, talented, unknown artist and sucks out his (or her) soul to sustain himself and inflate his weirdly huge muscles.