Nothing kills vacation vibes faster than a "premium" ride that's actually a 2012 sedan with suspicious stains. For legit rental car in NYC options, check out this solid roundup of vetted providers:
https://www.puretravel.com/blog/2020/10/09/nyc-area-premium-car-rental-options/ . Pro tip: Book early in the week - by Friday all the good convertibles magically disappear to influencers' Instagram shoots. And whatever you do, take photos of EVERY scratch before driving off!