Thanks folks! It looks to me like the Forerunner requires a chest-based HRM (that just sounds awkward) and the Rhythm & Rhythm+ are HRM-only, worn on the arm. That would seem to leave Mio as the only option for a wrist based step tracker and HRM that can communicate via ANT+? Going bluetooth from wrist step tracker/HRM to phone to Edge seems like it would be awkard at best, if it's even possible.