After reading this thread, and many similar, I bought the Shure E2G (same as E2c's) and think they are superb
I have been using Koss KSC35's, which are pretty good but a bit leaky and don't provide the sound insulation I want. Even from a few hours listening to the E2G's - I think the KSC35's are going to be retired. The Shure pair just sound so well balanced, and don't pay much attention if someone tells you they have no bass, they probably don't have them fitted correctly. The E2g's make the Koss pair sound, well, flat.
I picked up mine from advancedmp3 players
http://www.advancedmp3players.co.uk...Shure_E2g_Sound_Isolating_Earphones.2171.html
where they are advertised at £39.99, but I got them a fiver less.
As I've read elsewhere, you just need to experiment with the various plugs supplied to find the best fit for your ears. I'm sitting typing this listening to Gorillaz 'Dare', and I don't even feel the headphones...just hearing the music. Excellent!
Suggest you give them a try...
Regards,
FrankyG