Starting to look at tires....

Have the 18 inch rims ordered.
Looking at 315/30R18 on the back.

Front?
Can I go with 265/35/R18 without any rubbing? Or what size should I get for the front? 245/40? 245/35? 255?
Seems like 315/30 on the back is what most do but the front is all over the place for sizes.

Seems my options for tires are pretty limited too if I want the same tire on the front and back.