I would deff get 18s, they will look smaller because of the design. Wheels that are deep-dished allways seem to look smaller from the side since you dont see the spokes going to the lip of the wheel, hence why ppls 03 Cobra wheels allways look so BIG.
I like those but im not really a fan of the rivits or what ever you want to call them. I think those would look killer black with a polished lip.