Well if you want to impress chicks, then
buy the car. Who wants a chick impressed with a rental.
BTW I posted a week ago about driving the wonderful 355 spyder. That car was sold today to someone in California. It is his second Ferrari and will be a daily driver and he is very young. In trying to make the deal he complained that Southwest airlines was too expensive for him to make the trip to see it.
Rent the F355! I just remembered the chicks in Vegas are rentals too. They may not care.