i dont have the best credibility when it comes to mixing knowledge, but i’ve been using Sennheiser HD 450BT’s when i ride the stationary bike and make beats on the M8. i think it sounds great for that use case, and it has a detachable cable. i have charged them maybe one time in the two years ive had them since i never use them for bluetooth, and they dont need to be powered on to use the physical cable.
but they have lasted me quite well, even after sweating hardcore into them and tossing them around my workout bag. only ever had to worry about the padding slipping out of its spot but its been easy to put back on.