the sleeving on my sony earbuds dissolved from sweat(im one of those people who wears the wire inside my clothes)+aftershave, it only took a few months of excessive use for this to start happening, now theres only minute remains of the sleeving left on the earbuds, the wires finally started to feel the strain and strands are seperating ..
im due to buy some new ones, might buy some new sony ones if theyv changed the sleeving material when i get a new mp3, mine broke a few months ago and then my replacement got stole 3 days after i bought it while i was on holiday
oh the joy. You probably wont get the use out of a £200 pair, id go for the sonys of sennheisers..