I'm from Westchester, and I got my Jeep used, not through a dealership. But, I went once to the dealership in New Rochelle, on the post road (maybe its Larchmont, but right around the border) and at least the guys in the service department were complete idiots, so I would not recommend going there. Maybe the people in sales are a lot nicer, but i did not get a favorable impression.
Drive it like you rented it, not like you stole it. Cus if you stole it, you'd be driving 5 mph below the speed limit and using your turn signals.