John, glad to see that you got your new 6..... they really are too much fun..... if you go with 285's in back you have to choose between the 30 and 35 profile... I went with the 35 for more sidewall but that meant I had to put taller spring spacer pads to stop a slight rubbing with the 19x9.5 ET35 AMG 810 wheels. The 35 profile is 26.8" tall.....

Welcome to the club and ENJOY!!