I'm also looking for a solution, but hoping for one with less cost than the Garmin route. I want speed, cadence and heart rate for me on my handlebar, and same for my wife on her handlebar. I thought that we could go the Cateye route, with their wireless unit that we could sync both my and her head unit with one speed/cadence sensor on the bike. But according to Cateye tech support, can't sync two head units to one set of sensors. Any other suggestions?