I'm all about have fun/fast cars, but I think you are going down the wrong road here. I've taken my van up and down the rockies several times. No, you won't be passing any S4 Avants or WRXs on the way to the slopes, but I've never felt the need for more power. The VR6 will cruise at 80 without too much of a problem. I would worry about the impact on the transmission though.