Hi all, I am currently running a  Shimano R500 wheelset and to be honest i have found them to be quite average the wheels are about 15 months old and in the past 6 months i have broken 3 spokes. I am looking to upgrade although i'm not ready for carbon wheels. I'll probably be looking to spend between 500-700 give or take. I basically want to know what is the best bang for my buck. I was concerne…