You can always look into in the turbo motors, they make killer power with little effort and still seem to be easy to drive on the street.
My biggest problem with the high horsepower engines on the street is all the other cars around you. Dad's wagon accelerates so fast, it's to risky to even step into it with all the cellphone drivers around. Years ago, traffic wasn't as bad and you get away with a little hot rodding, not now. Just driving carefully in a old car draws attention.
Joe