I've been using Zaino Bros stuff for paint protection.
I've found Turtle Wax Protectant to work fairly well for leather, vinyl, rubber, etc.
I've also found a polish called Flitz to work really for aluminum (non-anodized). I believe it's the same as Mothers Mag Polish or something like that.
A final wipe with a GOOD shammy will remove all final water spots and other stuff from a surface after washing. I usually don't wash the car but will wash and shammy my aluminum wheels and they look much better than cleaning them any other way.
I too don't notice much difference between any top line waxes in their initial appearance but there is a difference in the longevity and maintenance.
I used Zaino on my black S-10 and it still really shines at a 15' or 20' distance even though it is completely covered in dust and other stuff when you actually get close enough to see it needs cleaned. Before, it pretty much always looked dirty except for the day I cleaned it.
Peter