My RHA T10i bit the dust again (memory wire inside ear hook broke, AGAIN, same place. OF COURSE the cable isnt replaceable, its the only weak point in the product). I use the neutral filter, which still makes for a very bassy headphone with excellent sub bass. I'm looking for a bluetooth IEM that can replace the rha t10i. Good bass, microphone, pause/play button would be the minimum requirements. I have almost 400 bucks in points on amazon, so i can get pretty spendy on it. They'll be used to listen to audiobooks and music while biking, driving, mowing the lawn, doing chores, working out (eventually, or so i keep telling myself), and potentially sleeping. I'd consider just using some cheapo earbuds for sleep as thats probably the most physically taxing thing they'll put up with. That and a lot of sweat. i'd use them for a lot of conference calls too, probably, for work. EDIT: i saw shure sells a bluetooth cable thing. The 215 has a pretty gross sound signature, way too warm and bloated. plus the plastic housing nozzle tends to crack. I've had housing issues before, which is why I went with RHA's stainless steel design. Alas, they found a different way to cripple the product.