Polar's RS800, which was originally introduced last September, is getting one-upped this fall by the RS800G3 multisport training system. Essentially, this acts as a GPS upgrade to the wristwatch, which "enables athletes to measure speed and distance for a variety of outdoor sports." The entire system now consists of the RS800 wrist unit, Wearlink W.I.N.D. heart rate transmitter, ProTrainer 5 software and the G3 GPS Sensor, and those who already plunked down for the watch last year can purchase the G3 GPS sensor separately. The sensor itself packs a SiRFstarIII chipset, is water resistant and can last around 15-hours on just a single AA battery. Price wise, athletes (or athletes to-be) can pick up the entire RS800G3 bundle for $499.95, while the standalone G3 will run you $139.95.