I have a heart condition that requires me to now use a HRM while I run. I used to have a Polar HRM back in the day, but I've noticed that TIMEX has a line of HRMs. How do they compare to Polar HRMs? I'm looking to get back into local road race shape this summer so I don't need all of the bells and whistles, but I a mid-grade HRM is what I'm looking for. Any input would be great.