Generally speaking when it comes to bikes and scooters - if you buy the size that you think will just do what you want it won't be long before you're wanting 'just a little more power' - or something that will pack 2 up a bit easier. A 400cc scooter will allow you to ride wherever you wish. Including freeways. The 400cc Burgman is capable of 70mph all day long and it has light enough handling to navigate in the city just fine. Even a 650 Burgman will handle well in the city.
I've heard more guys/gals carp about not having enough speed when they made a conscious decision to buy small than I've ever heard from those that bought bigger than they needed to start with.
If you aren't interested in riding freeways (don't blame you there) then a 200cc Burgman would work well for your stated travels.
I hope that makes sense to you.
2008 650 Executive 'Darksided' on 5/17/2013 - Federal FORMOZA FD1 165/60R14 75H BSW
Givi 46L Standard Top Box
Clearview Large Shield with Vent
Avatar - 1969 Kawasaki H1 500cc triple - Yup - used to have one!
Riding MC's since 1965
Cages: 1971 Karmann Ghia - 2012 Nissan Leaf SL - 2006 Buick LaCrosse