rodney, with the 12m you'll need 12kn MIN to be happy with. 14m to 8m is a big gap, that's for sure. Not only in range but in speed as well. I would go 12m-8m at your weight. I have a mate who's 85kg, advanced rider, and he has an 8m and 10m. He's happy with them at the moment but he would like to h...