I would like a new HRM that is just a HRM and has more features such as average heart rate, time in/above/below zone, and possibly test V02max. I had a Supergo HRM that worked fine, but offered no real features except having some of the bicycle computer functions. I need a new one because the bike computer functions are out. The Polar A5 somewhat fits the bill, but the reviews aren't that good. Are there others?