Thank you for responding.
I will mainly be listening to alternative rock music.
My ears are kind of shaped weird but I have some triple flange tips that will provide the isolation I require. They must be comfortable and lightweight though but not strictly so.
Sound wise I appreciate balanced sound with tight bass and clear mids and highs. Durability is the main issue here. Both my Nuforce and V Moda IEMs lasted less than a few months each and I used them very carefully with their included pouches.