Just picked up a pair of skullcandy inkd earbuds. You can't beat them for the price - do a pretty good job of isolating the ambient noise, and the sound quality is much better than you'd expect for a $20 set of earbuds! I am very pleased with these things - I have been using etymotic er6p's and these sound every bit as good for 1/5th the price! They also come with different size tips so that you can fit them to your ear, and they're very comfortable.