Lol, 1000hp Subi. Fuckers can barely handle 600hp without extreme chassis twisting. I'm not sure about US pricing, but I don't think a chassis strengthening, forged engine, custom intercooler, GT45R turbo or better, shit a fucking Rigoli or KAPS trans alone will blow your budget. I think this hypothetical person is living in lalaland if they think they can drop $10k on a STi and think it will make 1000hp.
why not get a import r32,r34 silvas.. superas rx7... they alot more "fun" as for the computer no matter what u buy how much u spend it will be outdated in 2 years plus u cant use those specs for anything :L u can only boast