Anyway, it was the perfect opportunity to upgrade, and I had been looking for new phones for a while. Since I loved my E2C's, my first port of call was the E3C's, but I figured fuck it and bought the E4C's instead. Heres a pic of them:

I'm not sure how many of you are familiar with isolation earphones, but they really are superb for noisy environments such as street traffic, travel, etc..
The level of detail of the E4C is already impressive, and thats without the burn in (which i'm doing now). I was initially a little disappointed with the bass output which seemed a little timid compared to my E2C. But after a little fitting and EQ adjustment, i've got it nice and smooth without sounding too boomy. The high and mid-range is very impressive. This is without headphone amplification too, which was important since I want to keep things portable. I'm using the foam tips, which are now universal (I actually prefer the old E2C tips which come in different sizes - the medium one is slightly bigger than these, and fits my ears better). There are triple flanged tips too, but I had to cut one of them off to fit in my ear better. They sound decent, but the foam tips are more comfortable.
Anyway, I managed to buy them from an amazon market seller for £124.99 which is about £25 below RRP. People like Juggernaut are probably already well versed in isolation headphones, but for the uninitiated - try them! They take a while to get used to, but you'll hear your music in a whole new way.