As topic title states. Looking for a well isolated IEM which delivers a deep, tight and noticeable sub bass. JVC FX500, Hippo VB, and Storm Cyclone pr2 are all examples of bass heavy headphones, but they're all vented, which let's a lot of environmental noise get through. Can someone advise...

Hey guys,   Like the topic title states, I'm looking for a new IEM.   There is so much choice and I don't know where to look, what to look for and so which IEM to choose.   The requirements the IEM has to suffice are: good isolation (I work in a factory, and so a loud environment)...