hiya .welcome to the group.advise is free ,lol.it's all down to what you want from a scooter that makes the choice a bit easier.
first is obvious what licence do you have.
then it's down to:-short distance then smaller 125cc,even though i regular did 140miles on my swing 125,medium 250 / 300,or full touring with maximum comfort ,then it's the bigger 400 / 650.
it's also cost and if the scoot fits you,you need to sit on a few .differant bikes / scooters fit differant people.depending on your size and height. (as in some scoots are taller,which aint no good if you got short legs) that sort of thing.
it's like iv'e bought the silverwing because it's the scoot i really wanted ,and it does all that i want it to do,leg room , storage and lots of it to..a good turn of speed when you need it,comfy....my only down side to the silverwing is it's bloody heavy, and now iv'e moved house parking is a pain ,.you have to take a lot of things in mind when you buy as it has to do what you want ,not just look good.no good having a race hourse when you live in a flat.