I am using the Shure 315s at the moment after using the previous model for quite a few years. The current design has a superb, tough Kevlar reinforced cable (that can be swapped out right up to the ear unit) and the sound isolation is great. Can't fault the balance of the sound at the price.
As far as in ears go I'd say these are very very good.
Etymotic do some nice in ear ones too but i thought the cabling is lightweight
