They all work... so for most applications, it really doesn't matter which one you run. It might be best to stick with the GM fluid.
If you plan to drive your car in the sub 40 degree temps, the heavier weight fluid options make the shifter more difficult to move on cold mornings until it warms up. They also likely will reduce your mpg slightly.
I switched to the Redline Shockproof as I am aproaching near twice the rated touque through the F40, and the shockproof line is designed to help in these extreme cases.
