I think it would be helpful to know what you want the car to do. Youve got a CR, I think according to your sig pic. Im guessing you want to track the car. My point is what gears are best depends on your driving habits and what you want the car to do for you

If strait line acceleration is all that matters 4.57/477 might be best
If you want to track the car and not have to shift through corners constantly 4.77s are prolly out of the question.
If you want a higher top speed maybe 3.90s
Like Negcamber said though, contact puddydaddy