I like Megs Pro stuff.
Basically when it comes to compounds you use either Farecla, 3M or Megs.
Topping wise, its basically down to individual tastes.
I personally HATE the Zaino 'plastic coated' shine, plus its expensive and a PITA to use.
But thats just me.
I like AIO and UPP, S100 and a few other odd items from different manufacturers.
Customers cars get #7 and a topper, maybe S100, maybe #20 or #26.
Depends on the price of the detail, the state of the car and the finish the customer wnats.
Point is, to me it comes down to performance vs price.
It may well be the 'Uber-Wax', but if its $100 a tub, it'll never end up on my shelf.