In terms of in ear headphones, I would reccomend the soundmagic e50(there is an s model which has a built in mic and what not) or the e10 the model before, there both great I had e10s for 2 and half years until mine broke due to wear and tear, but I could have easily got 3+ (very optimistic) years out of them. They come with a nice case compared to the those Sennheiser's you had which are built pretty poorly IMO. I had the CX300 you had and they broke within 3 months