I put SS caps on it because I like them better than the base model caps, I have both sets though. I did just buy a set of 18" polished torq thrust like wheels. I'm not sure if I should run with 35, or 40 series tires though. I guess I'll figure that out when it's time for them to go on the ride.
As to tire profile ask yourself what are the odds you will hit a pot hole? The greater the odds the higher the tire profile should be as flat tires and buying replacement wheels and rims because a pot hole flattened them gets to be beyond annoying.