I actually picked up a pair of Skullcandy "Ink'd" today and for 20 bucks, they're hard to beat. Clear, crisp sound, similar to my aforementioned Creative EP-630 but about 10 bucks cheaper.
I'm no audiophile by any means, but I do know decent sound when I hear it. I've bought other 'buds in this same price range and either returned them or thrown them away after one listen when their sound was too muddy or too tinny.
Only disadvantage of the Skullcandies though, is that they are not labeled L and R and there is no way to distinguish them. I had to do a little investigation to figure out which was which, and then etched a tiny "L" into the plastic case on the side of the left bud with a push pin. Problem solved.