I absolutely LOVE my superglide Sport. It performs incredibly and is a pretty good cruiser as well. At about 600 lbs and because it has generous lean angles, it really can attack the twisties without hesitation. I can tell you that the Sporty is VERY hard to beat as far as handling performance and power to weight ratio. A couple of guys in our group run the Sportster and when we get a wild hair, the FXDX's, Sporty's, and V-Rods leave the softies in the rear views.
My Best advise would to be to go and TEST ride the models before making a choice.