I don't want to really get involved in the 'hateration', but you can put together a Porsche setup that is financially very competetive to the 'regular brakes' out there. Performance will be in a different league.
It's about driver confidence, and that's worth the investment. I drive the bus as a daily through city/highway traffic, and the 944NA setup has probably saved my skin a couple time whereas I know that a drum setup would have me crashing into the back of the car infront of me. In a lowered bus that is a huge concern! If I ever crash that thing I'll lose my legs, literally.
I'm getting my 944 Turbo brakes ready for my bus because I'm rolling in cash and like to brag.
Lanner