Overtaking in the S is pretty easy, but as highlighted many times before you just have to make sure your in the right gear at the right revs. If you want to be able to put your foot down and simply pull out, this wont be the car for you. I think the power delivery is pretty well documented.
Admittedly mine is a moonrock and parked undergound with a cover on it. But I'd be more concerned about mindless idiots knocking it when parking or putting dings in the door. That said a nice shiny new formula red should be easier to see I'd have thought. If you are worried about security then think about a hardtop, but in honesty, if someone is hellbent on damaging a car then they will. If its a serious concern where youre planning on parking it, then maybe think twice, as if damage happens it will only annoy you further.
I've been umming and arring about changing my S, for something German, either Porsche or a 4 door (RS4/M5), but I love being able to drop the top so easily, I love the fact it revs, and I love that its relatively light on fuel and servicing isnt expensive and love that it is being discontinued this year. Just a matter of time until classic status.