I am looking for a pair of IEMs that have a good amount of bass and either ANC and/or very good isolation. I am moving up from MEElectronics Sport-Fi S6 and JVC HA-FX35. These are two pairs I currently own and they just do not have enough bass for me. I had a chance to listen to ATH-ANC23 and I thought the sound was good and the noise canceling was amazing but they had very little bass. I mainly listen to Metal, Alternative Metal, Rock, Techno, Dubstep, and stuff like this (https://www.youtube.com/watch?v=uGuMrJNZcAg). I will be on an 8 hour flight so it needs to be comfortable also. Active noise cancelling isn't a must but it would be nice, however if there is a pair with very good isolation and meets my other needs I would be more than happy to give them a shot. Also if it has ANC it must use non-rechargeable batteries.
Thanks for any suggestions.