Most likely late to the game, but if you are looking for a HRM and want something other than chest, consider this one (https://www.amazon.com/Scosche-RHYTHM-Heart-Monitor-Armband/dp/B00QSRQ1UM/ref=sr_1_2?s=prime-day&psr=PD16&ie=UTF8&qid=1468385825&sr=1-2&keywords=Ant%2B) currently on prime deal.

DC Rainmaker review: http://www.dcrainmaker.com/2014/05/scosche-antbluetooth-optical.html

He mentions it often as his go to option.