This is a tricky question. I will have to be the odd man out in this thread, as I have found carnaubas to have very good durability in my lengthy usage of them, with and without garaging.
You will ultimately have to determine which media brings the optimal look that will best reach your appearance objective.
But to answer the question, IMO I have yet to see an alternative lsp format that has brought out the intensity of color, sharpness of reflection and the widest reflective and color ranges in a paint finish with the same magnitude of several very good pure carnauba waxes. That's my biased opinion based on my experience with a variety of pure carnauba, carnauba blended lsps and synthetic lsps with a variety of different finishes.
However, competing products react differently to other colors and finishes. You may find in your observation that a synthetic product may do more to reach your expectations than some other carnauba or even other synthetic products. You should try out a few good brands and see which one produces the result for you in person.