I think that if i had a Ferrari, or indeed i ever do buy a car of the sort, it would stay under lock and key hidden away - and brought out only for personal use after a relationship had been established and would be shrug off as to not portray me as a typical ferrari/sports car nerd.
I truly cannot think of anything more embarrassing than to turn up to a first date in something like that, the notion that it would actually "pull" a girl seems bizarre to me - cars like this are a bit geeky if anything arent they?
I think you are worrying way too much squire. Clean pair of tighties and a shave should do as a good first impression. I couldn't be arsed if my car comes across in a certain way or not to women, at the end of the day, if you are a car-bore, she's going to find out. My missus clocked my number pretty early on, she had to ask me to remove my stringbacks to pass her the bread.