I have QQs, the 3 biggest differences on my policy is: must be garaged, you must have a regular registered car for each licensed driver in houshold and you can't drive it to work. There is also a line about you can't drive it more than 2500 miles (varies by insurer) per year (but since they or DMV never asks for mileage, does not really matter
). As long as you can get by with those rules, no problem. The issue will be if you are ever in an accident and you are not following the rules, it could get ugly.
There is at least 1 car show/cruise per day in NJ from May to Sept, so no problem there, just brush up on the ones offered that day if you are taking it out
The less than $300 per year ins and $0 for yearly registration is a nice change from regular registered cars!