Koss UR21. These things are only $18 at Wal-Mart. Great headphones, even though having to wear them at an angle gets uncomfortable after awhile. The sound quality is comparable to a clearer PX100, slightly bassy, great mids, and very clear high end.
Compared to the HD201 these aren't as bright and more bassier. Though I like the HD201's mids a bit better.