I actually really liked the 009 and BHSE I listened to at CanJam.
Did not care for the comfort of the O2 mk1 or mk2 and liked the sound and comfort of the 009 more.
The Abyss AB1366 is better than the 009's. You know how the logic works here right? The bigger the digits in cost, the better.
It has that magical mid-range quality that other cans do not have. IMO, a steal when compared to more pricey headphones, including the current Stax lineup.
Christmas 2015 or 2016 for the BHSE?
Hypothetical Stax SR 007 mk3 with less or more lightweight membrane ? ( compared to the 007 mk 2.5). Vents is clogged or not? Your pronostic ?
I've heard rumors that a new Stax amp for SR-009 would be quite costly.
Good thing that is you don't have to think about a BHSE anymore :)
The perfect balance between the "all for the mids" sound of more vintage Stax cans (SR-3/5, SR-X) and the extension of recent cans.