I just picked up a pair of Philips headphones from Target yesterday to temporarily replace my good ones that I accidentally destroyed.
I LOVE them. The sound is mediocre to good, but the best thing is the comfort and isolation. The part that touches your head is a very soft fabric and the fit is just wonderfull. They also have a 20' cord and a volume control on the cord, which is kind of nice. A little "midrangy" but otherwise $20 well spent!