Heat is caused by friction from the braking, no matter what you run for brakes the heat generated will be basically the same (for the same amount of braking). Swapping rotors doesn't get rid of any more heat, although you can manage the heat better by either adding mass (larger rotors) or in more extreme cases using 2-piece rotors to allow for better thermal expansion.
If heat alone is the primary issue then try to add some brake ducts for cooling. The stock calipers aren't horrible, they just need better pads that can handle the heat. Beyond that most track oriented brake setups start at $5K (rotors and calipers).
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