Wheels in my Sig is 16x8 20 offset with 205/40/16 stock camber and rolled fender. Sits very flush with no rubbing issues.
Between the 2 offset choices. I say go with the 20 for less work to make them fit. And for the tire choices on offset wheels, I suggest 195/45/15 for 15" and 205/40/16 for 16".