going off the original post, though, i'd have bought the a5.
if you can afford it, never ever pass on options you're on the fence about. you'll just be irritated with the car later and end up selling it. ever wonder why you see an abundance of stripper 328's for sale used? because they're a bit silly.
the beauty of worrying about the ~50lb or less difference you're usually looking at in gear is it gives you an excuse to mod