Following in Nathan’s and Karl’s lead I too went and purchased some Sennheiser CX 300 headphones.
I’m a huge fan of the default ipod headphones as I believe them to be the most durable, quality headphones I’ve ever had.
It’s not like the days when your headphone connection would falter and you had to twist and move them around or tape the cord a particular way to make it work. I also am happy with the sound quality but the reason I bought the new ones is because of the noise cancelling property. Catching the tube over here is loud, so loud you can barely here you music unless you put up to full-volume and then you are doing damage to your ears.
These babies so far have proved very good. Big fan! Also great for ignoring your co-workers :)