Cross-posted from the /r/headphones subreddit.   Budget: Up to around $100. Source: Sony Ericsson MW600 Bluetooth receiver, or smartphone if the headphones have a mic and on-wire controls. Requirements for Isolation: I'll be using them on my daily commute, biking and using public transport...

Is there a specific reason to why you don't list any earbuds? IEMs don't work very well if you have a punctured eardrum, so for me the sound quality of earbuds is FAR superior to IEMs.