Hi, I am buying an E-bike for the first time. I want to be able to commute about 5 miles to work, carrying my teaching materials. I am 64, my weight is about 225 and am 6ft. Here is my dilemma, cruiser or commuter style bike? I have narrowed to iZip Zuma large diamond frame or the Diamondback Landau (or iZip Path+) large, step-through. My regular bikes have all been 700c and I like being high, but I like the balance of the low battery on the Zuma, also. Any suggestions?