no doubt that Tom upgrade of the rear stock calipers is the best "bang-for-buck" solution, it's only downside being the lack of bling factor.
Obviously since the stock Gen2 can lock the front wheels, there is no need for bigger caliper/more clamping force in front.
Once you understand how brakes work, it's very simple to modify them to get the result that you're after.
first you have to decide what are you trying to accomplish, more bling factor, less fade, shorter stopping distance, less unsprung weight?
Bling factor is an easy one, biggest cross-drilled rotors with BIG calipers all around
Less fade is more complicated and revolve around better cooling, heat dissipation and thermal capacity and pads
That usually include air ducts, 2 pieces lager diameter rotors and even brake fluid recirculating or water cooling ( as on my Roush T/A)
Shorter stopping distance, keeping in mind that the limiting factor is the coefficient of friction between your tires and the road, has mostly to do with clamping force, weight transfer and bias balance.
MC diameter, rotor diameter, pads, driver skills, suspension, tires and calipers all play a role.
Less unsprung weight is accomplished by lighter components such as carbon rotors, and is the most expensive proposition.
Luc 00GTS