If you want to keep that SS save file and don't mind playing the game again (and can find it cheap which may not be that easy as it isn't that old yet) then consider if but if you don't care about the Pokemon on your current SS file then you might as well just start a new save file on your SS game. That's basically all there is to it and there's no real right or wrong answer as it depends on your liking of the games and all, so it's up to you.
Don't see much else in the way of discussion coming from this that has already been said, and there's the Help thread sticky for any other question you may have, so I'll just close.