Hehe. I can't argue with that. I can understand the 'attraction' of a Self Starter, one you get bored with kicking stuff -_-
If you can spare enough cash, then sure, proceed with Piaggio. BUT, if you ask me ... a better 'upgrade' at this point would be the GS150. Spend extra 25k something on it, with Alloys, Tubless Radials, and a Disk Brake upfront, and you'll have a MUCH MUCH better bike at your disposal.
Now thats how you spend your money, effectively.