It is all personal preference, but it also depends on the actual application and climate. Some people prefer the OEM fluids or even engine oil for the transaxle, but all of the alternatives are also nice e.g. Redline, Amsoil, etc. Pick your poison and adjust accordingly.
I actually just purchased the Driveline Fluid set from R'Venge about 2 weeks ago, which happens to be Red Line products. I spent an inordinate amount of time reading what others have used and there are just too many options to pick from. Chris has a great reputation and knows a ton about these, if it's good enough for his shop, it's good enough for me. Also helps that he responded to my message lightning fast when I wanted an expert opinion.
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