Sean -- I am not in Naples for the show this year, but I have been to that show several times. It is primarily late model Ferrari's; the show was started and is still dominated by the local Ferrari guys. In the past several years they have allowed car sellers in as sponsors and the show has grown a lot. In my view it is way too big for that small stretch of Fifth Ave and I don't enjoy it any more. I strongly suggest you get there very early and watch the cars arrive. By about 10am, it becomes wall to wall and you cannot step back even three feet to get perspective on the cars there. I've seen one e9 in the years I have gone.
Frankly, your time would be better spent doing a tour of the Revs Institute. Best collection of Porsche's outside of Stuttgart, a Mercedes Silver Arrow, Dan Gurney's Eagle F1 champion car, a Ferrari 400 Superamerica, a couple of nice Duesenburgs, an absolutely gorgeous Delahaye, several Cunninghams and a McLaren F1.
I may be down in March or April. How long are you there?