Garmin Forerunner 305

The Garmin Forerunner 305 goes a step beyond standard heart-rate monitors: it includes an integrated GPS antenna for tracking distance and pace. Reviewers caution that it won't take the place of a standard GPS, but it does get excellent feedback as a workout tool. This isn't a monitor for minimalists -- it's clearly designed for people who love gadgets. Advanced features include PC-based tracking software and a self-adjusting heart-rate target zone that optimizes workout intensity as your fitness level improves. If you just want to monitor your heart rate and don't need to track distance with GPS, the Timex Personal Trainer Heart Rate Monitor T5G971 (*Est. $60) is a well-reviewed choice. It's nothing fancy, but it gets very high marks for accuracy in independent tests.

With nearly 900 user reviews, Amazon.com is our top source on the Garmin Forerunner 305 GPS heart-rate monitor. Owners give their feedback on basics like accuracy and battery life along with assessments of this monitor's many advanced features. There are also several user reviews at CNET. We found the most detailed professional review at GPSinformation.net, where author Jess Grogan assesses the Garmin's functionality both as a GPS and as a workout tool. MSNBC.com and About.com also cover the Garmin Forerunner 305 GPS. Both reviews are primarily positive.