the garmin actually would be nice. i can evaluate my ride, so i can tell if i improved or not. and if i train harder i wouldnt need more aero wheels haha, does garmin edge tell you watts being put out? all i saw was the basic stuff, speed, distance, time, etc. plus elevation, heart rate, cadence. is the 705 worth it over the 500? all i see is that the 705 gives you actual maps while the 500 only gives you readings, then im guessing the more expencive one gives you more detailed maps. while the cheaper 705 gives you basic maps...i assume both guide you to your destination?