Garmin Forerunner 910XT

In addition to its hefty list of cycling and running features (heart rate, pace, more), the 910XT stocks sophisticated swim data (stroke counter, distance). One-button switching gratified time-sensitive testers, as did the watch's compatibility with many ANT+ devices. The wide face and display are easy to read but add heft. Regardless, the 910XT is a serious training tool for triathletes. [$450; garmin.com]