Garmin Fenix watch.
The genius of this watch is that it can beam maps and waypoints to and from your iPhone, so you are less reliant on its tiny grayscale face and can instead view color maps with the iPhone's pan, swipe, and screen-grab functionality. The Fenix tops other GPS computers for being small but still packed with everyday fitness functions (including heart rate and cadence, with sensors sold separately). And its nav system thinks in English, not trail nerd. [$400; buy.garmin.com]