Bang and Olufsen Earset 3 or A8s
I work for Bang and Olufsen, and we make a killer set, for about $200. I might sound a little biased, but honestly I could care less if you chose to by ours over another brand. Why? If I sell one, I make about 5 Bucks commission. And the odds someone reading this forum is going to buy a set from me? Don't really need to answer that one. That being said, hear me out about the inside scoop:
They are made out of aluminum, and aren't the isolation type that get shoved in your ear canal. You lose a little bass, but you can walk down the street and not get jacked because you are oblivious to whats going on around you. They have great sensitivity (don't need to crank your device, which saves battery life), and the stereo imaging is amazing. The highs are clear and sharp and don't break up. They also stay on your ears very well and are great for exercising. Plus, they come with a 3 year international warranty: If you break them, you can bring them into any showroom in the world and we will swap them out on the spot (provided they don't look like you ran them over with a car) if you have proof of purchase (we will help you out with this part by contacting the store you purchased them from).
We also have sets of the Dre Beats In-Ears, Bose on-ears and in-ears (Bose stands for "Buy Other Sound Equipment"), and the Klipsch S4s in our showroom and have tested them against our own. We beat them hands down. Our customers have all agreed as well (comparing them hands-on with their own phones and ipods, not our demo tracks).
Go find a showroom, and give them a shot. Not saying their the best thing since sliced bread, but you might find them to be exactly what you are looking for.