Polar Vantage V3
$599.00
Polar's training analysis has a long pedigree in endurance coaching, and the Vantage V3 adds an AMOLED display, dual-band GPS and offline maps. The wrist ECG and leg-load measurement are unusual additions for triathletes. Battery runs about eight days. The app is analytical rather than friendly, which suits coached athletes and overwhelms casual users. Choose it if you follow a structured training plan and value the physiological modelling.