930 brakes front & rear are the most popular and fairly easy. A bit expensive but very very good in terms of fit and performance.
A "poor man's" version of that would be to use 930 front calipers, Wilwood 11.75"x1.25" GT rotors & flat 1/4" hats. On the rear use Carrera 3.2 calipers and Carrera 3.2 rotors. This 930 want-to-be setup performs very well and retains the original master cylinder. We've used a similar setup with 964/944T calipers adapted by VCI, the required '86 944T front rotors (spindle spacers needed too) and the Carrera 3.2 rear brakes.
911 Brake Upgrades using 964/944T calipers Also performs very good and retains original master cylinder