If you are thinking about staying na, dont bother with bigger injectors. If you are keeping the turbo then I would get the sr20det rail for sale on here and get a remap. (the rail will need modifiing to fit).
all i know is my old engine had 2.0 primera injectors and a gtir fuel pump.
yes i am keeping turbo
and i am hoping if i install these parts that the problem i have will go away