The question is Rb20de or Rb25de?
The rb20de's have small brakes, and your car would have been complied this way, and came from Nissan this way, So the place your going to doesnt sound like they know what theyre on about. A r33 rb20e have small brakes too, but this is all the car needs.
Best bet is to just get new pads and not to worry about it, obviously Nissan thought the brakes were sufficient, so obviously they are.
Dayne