i ran around 240hp on 17"s with no problems, obviously the bigger and heavier the wheel will put strain, depends on the condition of your box/components lol.

ive ran all types of wheels on s2's, and personally i love the ride and look of the standard turbine rims, even when lowered they drive beutifull, 17s can give a hard ride dependant on your suspension setup, but look the nackers. 16s are a good compromise between looks,handling and ride.