One of my best purchases in recent years has been my Polar Heart Rate Monitor with the Footpod. I have ran in the rain, mud, heat, and sometimes streams with the footpod strapped to my laces and have yet to see a problem with the results.
I started this pace/distance tracking passion with a Garmin. About 2 years ago Jordan gave me one for my birthday and I found myself running in the middle of the night around our 3 mile track trying to see how many miles I could log. Bad idea. So, I put together a running plan that included the function of the Garmin and had a good time running sprints and long distances while using the aid of satellites to track my workouts. However, when I started running in more diverse locations in Houston including the woods, it got harder and harder to rely on those satellites to keep up with me.
So, I got the Polar HRM with footpod and haven't put he Garmin on since. Sorry, Jordan. Don't Get a Garmin. Get a Polar.