The Garmin Forerunner 220 is the ultimate running companion, a coach in the form of a watch. With a built-in GPS and accelerometer, the Forerunner 220 can track your performance whether you are on a treadmill or running in the great outdoors. Paired with a heart rate monitor the Forerunner can provide you with further information about your training and performance. The Garmin Forerunner 220 currently retails for $249.99.