Eh, they don't look too bad but me I'd leave them off.

I have 30mm spacers in the back and my front wheels are just about out as much as yours too.

I do get stuff kicked up by the doors and of course by the rear bumper but I've haven't got nicks yet (knock on wood).

I say leave them off as it does detract from the aggressive stance that I assume you wanted with the 315s up front!