I have a Honda Helix as a second bike, not because of any restrictions, it's just FUN TO RIDE! It handles like a dream, gets over 70MPG consistently, and did I mention, it's FUN TO RIDE! Yes, it looks a little odd....a 6'1" guy on a scooter, but I'm too old to worry about appearances any more. I take wife into work on it, run errands, and I always take the long way home. I think any of the Megascooters would be the same. The Burgman seems to be the "Cadillac" of the bunch, both in terms of good ride, handling, etc, and in terms of price. If price is no object, I'd go for the Burgman. I have ridden both it and the Honda Version, the SIlverWing. ( commonly called a SWing). My sis has the SWing, and I have ridden it quite a bit. SHe rides it from Norfolk VA down here to Canton every year for our October Rendezvous, and loves it. It'll keep up with the ST in just about any kind of riding, even on the highway .
Scooter tires, because of their smaller diameter , don't wear as long as Big bike tires, but they are cheap too. Maintenance is VERY easy.
I'd say, go for it....research the various scooters- all of them have their strengths.