I have mentioned the discs and calipers as a upgrade a couple of times here.

Haven't done it but seems easy enough.
There is another guy that I know in my town that did a brake upgrade to his bakkie using this car's discs and Ford Focus calipers. I don't know why Ford calipers but that is what was done.
That thing stops like crazy EVERY time. He raced gocarts in his younger days and knows how to let brakes suffer. These things didn't even turn blue or anything after 3 runs starting at 0km/h going to 200km/h and back again to 0km/h. The runs were directly after each other and braking was done hard.
Only problem is that you won't be able to run anything smaller that 14" rims.