My current setup is 18x8.5 apparently, or so it says on the door sill, they are stock. I'm really interested in some wider or bigger wheels, especially, maybe something like a 19x10 gunmetal shelby razor setup. Anyone know what I need to do to fit them correctly?

 

Just get the right offset. I forget what it is, but most sites you can just choose your car and see what fits. Also, look into tires as well as wheels, you may be surprised at the price of some tires, especially on a 19" wheel.