I have a fitbit one which clips to your body. It's great for tracking your daily activity, but I don't use it for tracking runs. I use a combination of runkeeper on my phone and my pebble watch for tracking runs. The pebble displays total time, total distance, and total pace from runkeeper on my wrist. The pebble also works with other fitness apps.

If you have your heart set on a gps watch the garmin forerunner 10 is the cheapest: http://www.amazon.com/Garmin-Forerunner-10-GPS-Watch/dp/B00TRFF9EQ/ref=pd_cp_422_2?ie=UTF8&refRID=1QJTBMH2XDG62SRDN9XF