Good quality yet AFFORDABLE earphones?

Does anyone know of any good quality yet affordable earphones?



And by good quality earphones; I mean ones where the right phone's sound doesn't rapidly deteriorate after a few weeks of being purchased and by affordable, I mean preferably under £15 or £20.



I'm not looking for anything too fancy; just something good enough for my iPod and something with a decent enough clarity to help mix tracks on Logic Pro.