This is kind of a weird list because many of these cars aren't competitors but I love the topic so thanks.
Artura would be borderline unbeatable if the build quality weren't abysmal and the engine sounded better (i.e. a NA V8 instead of a turbo V6 or something.) Nobody does better steering than McLaren right now.
The GT3 RS is arguably the best all-purpose track car on the planet today in terms of lap times and driver confidence. However, it's practically impossible to buy (and the S/T is even more impossible) even if you have the money and it looks kind of grotesque. The 992 Turbo/Turbo S are not even close to the type of sports car I embrace no matter how fast they are. They don't sound good and they do everything for you. GT3 is great both in regular trim and Touring trim.
I love the Miata. I like the BRZ, and might be getting one in the future, but the Miata is a step ahead. If you drive one you'll get it. If you're explicitly a muscle car guy you won't get it, but I get it. I don't like the Supra for a few reasons.
My two favorite new sports cars at the moment, in order, are the Cayman GT4 RS and Corvette Z06. I am well-known around these parts for my love for screaming NA engines and those two are some of the best ever in that department (my two favorite all-time cars are the Lexus LFA and Ferrari 458, to give you an idea where I'm coming from.) The GT4 RS is not quite as performant as the GT3 due to the lack of double-wishbones upfront among other issues, but in terms of emotion it DESTROYS the GT3 due to the absolutely ungodly induction noise you get inside the cabin above 3000 RPM in that thing. The Z06 admittedly ripped off the 458 but it did it extremely well, I have never heard an American car howl like that in my life and I've wanted one since the moment I first heard it.