Brake opinions needed

6days and no responses. Thats odd.
Ok, Ill offer my opinion.
Power is better. Especially with discs, and most especially as you get older. But the oem stuff typically is/was over boosted.Sometimes/many times, fine tuning is required.
With few exceptions,I would never go back to manual. The exception might be a very light weight car, or a car with an exceptionally good pedal ratio.
I assume youre planning a P-valve install, in the rear line?