Below is the before and after 20 spoke 19" to 20" Modulare with Pilot Super Sports. The ride WAS fine on the 2015 GT which I suspect has the same setup as my new GT vs. your V8S (or similar), until I replaced the air with nitrogen - then the ride became considerably harsher (will go back to air in the spring).

 

Yes - They are P40SC

I would not go with 20's again as I believe the 19's are more functional with more tire sidewall and will be lighter as well - Mine is not a daily driver but if it was I would definitely go with 19's - After putting on the 20's I think the 19's look better as the 20's are just too much wheel with rubber bands on them... To me the Pirelli has a more rounded sidewall than the PSS and contributes more to the awful rubber band look - Just my taste - my 19's will be track wheels and might find some additional time on the car

Fronts are 20x9 et42 with Pirelli P-Zero Nero 255/30
Rears are 20x11 et52 with Pirelli P-Zero Nero 305/25

I am not sure what the drop turned out to be as I did not measure it at the factory ride hight - When I do coilovers i plan to raise it 1/2 to 3/4 of an inch

 

No sport package, the wheels were changed a few years ago after a couple of the original 19-inch 7-spoke wheels were destroyed by potholes. The car rides and handles great the way it is set up now, but I have to be careful not to scrape the front lip.