Im using the Sennheiser CX 870's. Iv had them for about 6 months and I think they are great, Clarity is "good" for all music types, Noise canceling is good enough for long flights, they don't fall out of my ears when I run with them, don't catch the wind when im out on my bike and have survived a spin in the washer. They are also at a price where you don't have to be scared to use them!
http://www.amazon.co.uk/gp/product/B003 ... hs_product