I am satisfied with my Sennheiser CX 400 II in-ear earbuds. It has Good sound quality and includes various tips so you can find the type that fits you best.
Creative Labs EP-610. I recieved a pair with my Dell computer. They blocked out background sound, stayed in place, and we'rent uncomfortable. They had adjustable earpiece covers, also.
JVC gummy ear buds are extremely good. They come in almost every color. They are $10 each but worth it. The only problem is that you have to be careful of the cords so they don't stretch.