I did bother fitting the brembos to my 33 and believe me they are a worthwhile upgrade. My original brakes were damn good with good pads and high temp fluid but they cant hold a candle to the brembos.
When I go to church with my buds all using the original brakes with pads, fluids, slotted rotors etc I have to remember they are behind me or wear one of them in my boot. The brembos stand the car on its nose and in prolonged use situations I have never had fade using them.
If you can get a set at the right odds then fit them, You wont regret it.