DJ Core
500+ Head-Fier
Ended up ordering the Symphonium Audio "Meteor" which arrives tomorrow from headphones.com (2 Day FedEx free shipping). I prefer it's tuning as per FR Graph and reviews confirm it's my kind of sound with the same super extended fatigue-free treble, better lower mid bass, easier fit due to smaller housing and way easier to drive vs Helios.I've heard good things about Helios. I'll give it a try as well.
Will report back after giving it a good listen.