thanks for advice guys, will give the details reviews from page 1 on the 500 and 705 a good read and then decide, doing some further research seems the pricing is pretty similar... Edge 705, Heart Rate & Speed/Cadence - $549.99 (R4240 @ R7.71/$) Edge 705, Heart Rate & Speed/Cadence - R4499 - http://www.jump.co.za/compare/garmin-edge-705-hr-with-hrm-speed-cadence-sensor-basemap-2118.htm