Sports cars and leather never have gone hand in hand - look at Japanese performance cars as a perfect idea - always Alcantara as it grips better in corners. Same with an auto box - a "sport" car is a drivers car so people want to interact with it, not be piloted. I would only ever buy a manual gearbox in a sport car of any kind - even one as watered down from true sports car as a Lexus.
My 350z had leather seats, agree about the gearbox though.