My first suggestion is to look for some OEM wheels like the touring version wheels or, if you can find them, the Rays forged aluminum wheels from the track model. Both styles are 18 inches, they're OEM so you know they'll fit with no problems, you have a huge number of options for tires, you don't have to worry about picking up some hibcentric spacers and they'll keep the TCS/VDC happy.
You could also look for some of the second gen track wheels, still forged aluminium by Rays of Japan but the fronts are 18s and the rears are 19s.
I wrote a wheel identification thread a while back that has the size & offsets listed for each of the wheels along with images of each one.
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