I would have to say 300 - 400 rwhp. It wouldn't really take much, just a small turbo kit, good catback, and a good tune

I'm sure a lot of people say as high as possible, but whats the point? there is always going to be someone faster! What is the point of an 800 hp car that you can't drive safely every day? 400 is great power and would be much easier to drive