It all adds up quick, dont it?
Without track duty, you might get away with GT brakes. The Cobra brakes MANDATE 17" wheels. You'll probably get 17's anyways. Depending on what youll spend for GT brakes, the M2300K brakes are about $1700.
As for suspension, I would do the Steeda thing. Now its a little overkill for the street, but with sticky tires, you'll be ok for the track too. This makes quick use of the $2500 budget though.
As for tires, get the softest compound, fastest wearing, tires you can. Yeah, you'll go thru tires, but the rewards are definitely there. Otherwise the suspension aint worth it. Take the suspension budget and spend it on tires then.