vipervick
500+ Head-Fier
LOL, none of my headphones are worth that much.
Ideally, I'd like to spend under $100 used. I have a bunch of tips.
I don't know if you will like them, but the Etymotic Research MK5's are like $60. They have the best passive isolation and almost refuse to come out of my ears. I use them under my motorcycle helmet every day for a 1-hour commute each way to/from work. The only downside to them is that they are super neutral. I have my iPod classic 160Gb EQ set to Rock, FiiO E17 gain to +12 and bass to +6. Without the boost they sound really thin. Other than that, they sound great.
However, I listen to metal, which is the reason I'm in this thread. If you listen to any EDM or other genre, they probably aren't good.