Thanks everybody. I'm going to paint the rotors/capilers black when I get some free time.
The ride isn't harsher at all (which I was worried about choosing 18's). Braking with the extra rotating mass requires a little extra brake pedal force, but overall the brake action feels smoother.
The wheels are 245/45/18, 8" wide. When I was looking for new wheels, I wanted to get 17's, but my friend sold them for a price I just couldn't pass.