HELP ! (please) ? I am 68, male, 5'11'', 155 lbs. first time user and finally narrowed down my choices to either the Radmini4 or Sondors Fold xs. my interests are general fitness, fun, ability to do on and off road, put into back of my vw Tiguan. Need dependable, quality product. Please advise as to which would fit my bill ? most appreciated.