Wheels have finally been chosen and installed.
Black Rotiform KPS 18", 9.5" width and a 35mm offset wrapped in Michelin Pilot 4S 265ZR35-18 tires.
These are a bit wider and lower in offset than I was originally looking for, but I like them. But they almost put the car in wide-body territory. Almost. For now, I just had to roll the fender lip and pull a tiny amount. No rubbing.