Just curious, how much track experience do you have? I've read a lot online and I am keeping my '07 stock. Based on what I've read, you don't want a really fast or good handling car as a beginner.
I've been to 4 track days and have been signed off solo. I only plan to change things as needed. For example, when I get brake fade then I'll look at different fluid, pads, and maybe ducting.
When I can drive to the limits of the stock tires and
suspension, then I'll consider upgrading.