Well you do have the 4v which responds a bit better than our 2vs. you still have many mods you can do like gears, tb, tuner and or dyno tune, headers and cams.
IF I had your car I would try to get as much hp as i could NA and then see if thats enough. I know someones gonna say that there is no such thing as too much but a 4v NA with full boltons has got to be pretty fun. I dont think you would be to far from low 12s with full bolt ons and some good tires