I previously owned the black CX300's which broke a few weeks ago after being battered around for the best part of the year. I got stuck using your basic in ear headphones until these arrived, and you really notice the difference. The bog standard headphones felt uncomfortable and sounded pretty bad.
Then these white CX300's arrived, nice and cheap and the sound quality (especially base) is pretty awesome still. But the main thing is the cable, the white ones have a kinda rubberised cable, which feels nicer and a lot more flexible than the black one. The cable is what broke on the black ones, the sheathing breaking in two places.
I heartily recommend these CX300's, and the eco packaging's a nice idea too.