I would buy a 300bhp Saab for the few times I could use it. My driving is mainly rush hour commutes. But occasionally everyone else forgets to get up, or I take a half day, and get a clear road, or go drive somewhere rural. For those few days, the power is worth it, because the rest of the time, it is in reserve should that kind of need arrive. I like to drive a car that I only use 50-66% of what it does. I don't want to be at 99% all the time. Something extra for the weekend as it were.