Self defense works great when they are bigger than you. Otherwise just make up an equally sad story that it was dark and you were scared and the thief said he wanted to penetrate you etc etc. If its your word against his I know who the jury would be siding with.
Its a great market if your selling import NA anything, its pretty much name your price if the car is low ks, mint body and manual. Body kit, wheels and paint increase value and sale capability even further.....
Wouldnt you rather have that power at you rear wheels? Anyway its not hard to get the power your after on you budget as everyone else has mentioned, If you can do most of the work yourself. Other than that you should be able to find plenty of R33's with that sort of power for sale.