18x8.5 et45 is the most common fitment for aftermarket wheels for these cars and sits flush with the fender.
18x8 et40 will be fine as well.
Fitment really isn't as complicated as many people make it out to be. You also don't seem to be that low either so you should be for the most part golden.
18x8.5 et 45 Tarmacs on my R. No rubbing (unless two people in backseat and I hit a bump at 80 on the highway ). Got some compression rubbing at WiTW but taking dips the way I was, at the speed I was, it's bound to happen. I don't know my FTG but I'm lowered somewhere around ~1.5"