I've been considering either a Whipple or ProCharger. I'd like to see and honest 75 MPH (currently get 60 on GPS) and would like to cruise a little faster at lower RPM. I'm concerned that the engine has 400+ hours on it and I don't wish to compromise reliability or longivity to a great extent. All Seasons Marine in Boulder City was pushing the Whipple, bad mouthing the ProCharger to the point of saying people have installed the ProCharger, and not liked it to the point of removing it. Any words of wisdom from anyone?