What should I spend my money on now?

[2g Monson]

Well its spring and I'm trying to decide on what to buy for my car. I want some more power but Im confused what to do. I have a 95 GST with: 16g turbo, fmic, 255 fuel pump, 550 injectors, Neo AFC, and running 17psi. Im pondering some bigger injectors and an intake manifold, or cams and came gears, or DSM link. Is it preferred to use a PC for that or does a MAC work good too? Any advise would be great