hey Chris,
as you know, my car is stock, high miles, fat, soft etc.
Brakes were a nice thing to have dialed in. The new rotors and pads bit MUCH better than the OEM stuff.
I run the Kumho MXs now, and they are plenty good enough for me.
I want new Tbars bad (see soft suspension note above) but other than that, I think my car is plenty capable on the track.
Our cars were made for this
-Chris