Sport has extra's fitted as standard like heated screen which is very nice unless you've got great long arms!
3 doors are cool, but can mist up a bit, possible leak from hard/soft top and the targa sunroof can drip with the condensation at winter, but if you don't mind that you can whip the top off in summer but how likely is that. 5 door model's are nicer inside 2. Saying that I bought the 3 door so what the hell do I know haha!