(Not to mention, at least for me, such tools have proven horribly inaccurate.)
According to a large body of research (http://www.polar.com/en/about_polar/who_we_are/research_inde...), the Polar brand heart rate monitors provide basically medical quality data.
Have you really tried one of the new Bluetooth LE monitors, and what sort of problems did you have?
It's vitally important to me, because my startup revolves around the rock-solid, years of research that have gone into developing these devices.
Thanks for letting me know.