Hey there I'm 51 and first time e-bike buyer. Haibike Sduro Hardnine 7.0 2017 or Haibike Xduro Hardnine Carbon 8.0 2017. 80% main road and 20% offroad. I have a bag injury and have only 50% power in my left leg. PW-X or CX Performance. Please help Bobby from Denmark.