Were you just bored? your a member of 240sxforums.com and I told you that they sell rotors for the z32 brakes that are drilled for 4 lug already. If you really are just wanting the upgraded breaking go with ebc slotted and dempled brakes with ebc green stuff pads. Remember the brake setup I had on my first s13? It was exactly that and it had mad stoppin power and never once did I experience brake fade with that setup.
The extra streinght of being 5 lug over 4 lug really isnt the reason to do the conversion either, the 4 lug will be plenty strong, especially for your use.
The real reason to do the 5 lug was more so in the past, when it was nearly impossible to get good wheel fitments in 4 lug, or well, at least the selection was more limited. The set of wheels your wanting are a great example of good fitment 4 lug wheels, the only problem is you only being able to find 1 set of them.....
It would actually kick ass if you were able to find 2 sets and buy both sets.
The s14 wheels may look good but honestly they arent wide and dont have the best offsets in the world. I wouldnt spend money on the car just in order to make them fit because for the same money you can have better looking better fitting 4 lug wheels.
Plus I found a place that carries them bad ass fender flairs so you can drop the shit out of your car and cut the fenders out just a little and have the flairs cover the 8" 0 offset wheels.