See
the base of this page on my thread for pics of my NC wearing 17X8 +45 / 215-45 (couldn't get the Preceda in a 225-40). As you can see, there's plenty of room for me to run a 225 tire, and i know at least one other NC (lucifuge) on these forums running the same wheels, same size + offset, but with 225 tires. Depends on lowness.
I can't see any problems with 17X7.5+43 on an NC since you will have more clearance on the inside, and not sit out as far out on the outside (effectively 4mm less).
Can't help but ask.... what wheels, eh?