double checked, only type-M R32s came 4 pot brakes. so you're right.
while, rb20 turbos aren't strong, that's an easy fix. probably bolt on a rb25 turbo when i have the cash anyways. however, spending 10months on nissansilvia, i did learn that SR bottoms ends aren't that strong. also, even if rb20s are more likely to fail, they are half the price if not more. considering the car is on a tight budget, seems like a better idea. considering, if i get a s1 s14, i would have to get a s1 s14 or later engine, probably around $3k for the engine alone. rb20s go for around $1k, obviously older and less popular but that's a decent price difference.
really doesn't matter that much, it's my first car. ill probably ruined it anyways yet ill have to experience required to look after/drive a TT supra or GTR afterwards.