I have Dell MP3 player and the headphones it came with were busted within 6months. Sounded like shit too!

I have a pair of Sony headphones I use. I use to play the turntables so they're super nice sound, and comfy to wear.

As for earbuds, when I'm out and about, I have a pair of Panasonic ones. They seem to be good and holding up. I just got them at the Source here in town for $25. High price, but worth it.