So you got them eh?

I go about 36-37 psi on my 18s.

As far as the rubbing goes, a lot of the rubbing can be eliminated by trimming the rear bumper...the plastic tab where it connects to the fender. Some even go further and remove the screw and trim that whole area away. If you do end up rubbing on the fender lip itself, and it happens enough that it drives you crazy or is damaging your tires, then you can get your fender lips "rolled" back to eliminate the rubbing.

I trimmed my bumper tab, got rid of most of the rubbing, I occasionally rub now, but only when I hit a bump going through a hard turn, or a hard turn with people in the back. I don't sweat the minor rubbing, no real damage on the tire, so I just live with it. It's close enough that my camber settings determine if I rub or not. Right now I have it set up so it's a decent balance of tire wear and rubbing. I'm right at the spec limit for camber.

18x7.5 45 offset, 225/40-18s. Without camber correction, I never rubbed.

Hope that helps.

Oh, and post up some pics.