Buy a BETA ofcourse.
They are the best, cost around 28.000 kr in new price and are fun like hell to drive. Whit jus little tuning they will go ~90 km/h.
Otherwise, buy an Aerox Scooter, they are really cool and are very good quality wise.
However, i would suggest
Blocket.se - Sveriges största Köp & Sälj marknad and trying to find something that looks cool, then talk whit a friend that knows something about mopeds and see what he says.