+1I'd probably go smaller than a Burger, just for ease of loading and handling. My SH150 is my main errand runner in town, and between the top box and pet carrier, can handle a surprising volume of goods. Even has a bag hook for extra capacity. Quite a bit smaller, lighter, and easier to handle than a Burgman. It'll go 60 even with my big, tall, and heavy corpus, so pretty suited to city traffic. With the tall windshield, pretty good weather protection as well. Gets around 80MPG or better. If the goal is to have a bike to tour on once you reach your destination, then, yes, you'll want something bigger. But a mid-sized scooter is remarkably practical as a go-getter, and relatively cheap. Won't wake the neighbors when you go out for early morning donuts, either.
My tubby self and my wife can both ride her PCX 150 scooter. Not much suspension left with both of us on, but with a 30 liter top box and an even larger storage area under the seat, we can carry quite a bit. Top speed as indicated solo is about 65 mph and with both of us it drops to about 55mph. With the smaller wheels though, 45mph and under is really the sweet spot. Any faster, and the scoot starts to get a little squirrely.