The sky is the limit honestly. You need to decide what you want to log first, then decide which logger will fit your needs best. The Racepak sportsman is less expensive but has more limited capabilities from the factory, channels that it can monitor and type. The v300 has more capability while the 500 has the most. Prices for the base units go from $850 for a Sportsman to $3200 for a V500o unit. All other channels(sensors)are extra and those prices vary and interchange with each unit.
