You want linear power? Spray it for under $1k.
You want to go FI with linear power, roots type supercharger.
You want FI and want a higher powerband, with more “potential”, go Turbo or CS.
Each and every one of those options, if well implemented, will give you a broad power band, good response, and a very decent bump in horsepower.
Blah Blah only 7psi people… you do realize that if you boost (turbo or CSC) an engine with the proper parts 7psi is still holy shit performance.