What offset to go with?

Whats up guys, recently I posted on here considering either 15x8s with radials or 13x8s with slicks, welp 13x8s wont clear my brakes so Ive decided on 15x8s with radials. Ill have 225/50/15’s on the 15x8s but I was curious which offset to run +20 or +40? I plan on running very little camber due to I want as much tire touching the ground as possible (daily driver/straight line car). Thanks Everyone!

+40