I ran out of my Megs Black Wax Paste few years ago and now I'm starting to miss it. Might buy it again because I loved using it and loved its finish.
These days my go-to wax for my black car is Collinite 915, even though I have a few other waxes too. It's relatively easy to use, has a nice finish and is surprisingly robust - considering that my car is always in sun in Karachi heat, and at night there is lots of dew here.
As toppers I use Collinite 520 or Tac System Shinee Wax from time to time. Shinee Wax probably leaves the most glossy finish of all the products that I've ever used.