staggered

I'm trying to decide between a staggered wheel and tire setup or a symmetrical one. What is every else running? Any reason you prefer the staggered or symmetrical setup, and also how wide of a wheel can you fit up front and in the rear I was looking at maybe 9.5 up front and 10 in the rear for...

I know there have been plenty of posts about this topic here... However I am having a hard time figuring out what I want. My 2015 Scat Pack M6 came used with Pirelli PZero 275/40R20s on it all the way around. The rear is obviously more warn than the front... (Came that way I swear haha) I am...