Replaced my stock 185 dunlops today with 205/50/16 Michelin premier a/s tires, 2012 GE8 sport completely transformed,ride quality and road noise significantly improved. Tried HR springs first,stock struts,painful,switched to sprint springs with stock struts,better,but these tires are a huge improvement.10mm spacers in back just because,no obvious rubbing, YAA!

 

Not sure what suspension you are running but i have the same size tire on oem sport rims and 15mm spacers don't rub in the back even with the back loaded till the wheels are inside the well. The front does rub with 15mm spacers on hard bumps & a passenger. I'm running megan coilovers & have about an inch gap in the rear & 1/2in front on the softest setting. I got the 15mm spacers 1st and drove about a week befor the front arrived. It's amazing how much more planted the car feels with a wider stance. Good luck, not sure if my info helps at all.