[LegacyRS]

The 2.5 RS is the choice for you. I know many RS owners, and all have done mild to extreme modifications. Even with mild mods (intake, K&N filter, larger anti roll bars) and you have an unreal car. Plus, if you ever really get into the mods, the Impreza platform is ideal. An EJ257 (North American WRX STi's 300hp 2.5 turbo motor) is an easy swap. Even a turbo upgrade is not a daunting prospect...and the results are spectacular.
I drove a civic during high school from 2000-2002, and no matter how much money I threw into it, it still felt like an appliance. It had no soul, which is important for me in a car. Now that Im building a Legacy with a highly modded EJ25 in it, I couldnt be happier. Subies are unreal! Their preformance, and reliability is great stock, but are potentially a very very potent ride.
I know you want an STi, so build yourself one. One thats better than stock, in a body style thats more attractive. A friend of mine is in the midst of an EJ257 transplant into his 2.5RS. The car is a destroyer of Vettes, Porsches, Vipers. Nothing can keep up. He has upgraded every suspension, chassis, and drivetrain component in anticipation of 300+ HP. This thing is faster, better looking, and handles better than any stock STi. best part is, its unique...especially in North America.
the other cars are all mediocre compared to the RS. They are boring, the Subie is not.