Either choice will not be a bad decision. When I purchased my Z, the dealer only had the base model in the color I wanted. After negoiting the deal and having the Spoilers added, I was pleased with the look and price of my Z.
While I did like the wheel package and options the sports model includes, I was not dissappointed as I already had 20in rims for my Z. The only reason they have not been added is because I want to wear down some of the rubber on the factory tires, before I mount the new ones.
You may want to price compare new rims & tires versus the things provided with the sports package (brakes, etc) to see which is the better value. If you are okay with the factory tires/wheels and want to save a little money by not getting the sports package, you have your answer.
As previously indicated, neither will be a bad decision. Just don't make a final decision you will not be happy with in the end. Good Luck
