Earbuds that fit...

Skull candy smokin’ buds are pretty good, even if they have a silly name.  They come with three sizes of soft silicone buds, which do a good job of isolation and are comfortable enough to wear for hours.  Don’t get them if you need to hear what is going around you, because they DO isolate.  Has a volume switch, too, and they go for about $30 at walmart, bust buy, fry’s, etc.   Only drawback is the assymetric design, which to me is pretty dumb, but I wear them with the cord out front and it isn’t bothering me too badly.