Hello Don,
Folks have made some good points here.
EFI is great (but no back up kick start)
Water cooled is reported to give longer engine life, better engine temps when cruising, even some heat to the rider on some (but comes with a lot more parts to go wrong or leak)
SYM 200's have a great reputation, and they have the big wheels (but would it be enough extra horses over the LIKE to cruise "comfortably")
Take your time. Think it over. Replacing the LIKE, or buying it a buddy, is not a bad thing.
Put your slippers on, make a nice cuppa'....and read thru some scooter forums (SYM, Vespa, etc.).
Plan a trip to go and at least sit on the ones you are interested in.
Buying a new scoot is a good thing!
Enjoy yourself. You know which ones are the good scoots....make certain you get the engine size you want and the color you like! (you can be a patient shopper since you like your present scooter!)
Good for you - and please keep us posted (with pics).
Regards, Stig