Hard to say since I dont know the condition or flow rates of your (old) stock pumps, I would say generally people seem to always overlook the fuel pump side of things. It was one of the first things i did on the ST. Then there could be no question as to if the pump was good or not. Its a small price to pay tbh for ensuring your fuel system is upto spec. As for state of tune, i would say that anyone with 100+ bhp should at least consider one.
Ed