surely bigger is always better no? You can never have too much stopping power.
you would probably be fine with mk2 16v discs and fast road pads or mk3 8 valve discs and fast road pads. its all down to your driving style really. are you going to be racing the car?
Just upgrade the fronts to 280mm and the master cylinder. Search on here - covered loads of times.Can't 'upgrade' the 239mm set up because it's sh*t.