So i need some new Headphones...

[Brogean]

For my music when i'm out on the trail. Right now im using some Skull candy earbuds, typical i know, but they have good sound quality. I'm looking to spend around 100$ if possible. I've thought about the Skullcandy Aviators which are around 60$ but i just want to know if anyone has any good suggestions, i really like ones with good noise isolation too. Are the Dre Beats really any good?