I second the Koss Porta Pro Jr.'s. $35 smackers and they sound 3/4 as good
as the Sennheiser 545's, which are $150.
but - the very BEST most insanly great headphone catalog is here:
http://www.headphone.com
i love this company. i have read through the real catalog like 10 times. its
very well written, funny, and informative.
shane