twister6 just posted a review of the HD-668 B headphones over on Head-Fi.  From the review they sound pretty good and with a $37 price tag their price performance in outstanding.

Pros: impressive price/performance ratio, giant killer sound performance, removable cable, replaceable earpads.
Cons: isolation and sound leakage due to semi-open design, not a typical removable cable.


Review of HD-668 B