I am looking to replace my HRM. I use a Polar (can't remember the model) that is 2 years old. Had it serviced last winter, so it should be in good shape, but, for no apparent reason, it will display amazingly high readings during an otherwise normal workout. I imagine it is either from interference or a poor connection (or my heart does really crazy bounces) but it is driving me nuts. I know I should chill, but I'm probably more Type A than I would admit. Anyway, anyone have a suggestion on a reliable, durable HRM that is not too expensive. The functions I mainly use are average, and high heart rate, and time in zone.