For dark colors,
Souveran and Natty's Blue (heck I use NB on light colors lol). Natty's Blue looks just as good if not better then the high end waxes, and god I love that smell lol. Goes on and off easy,
Souveran has a slight edge there as you can apply and wipe away immedietley. I kinda of like buffing a haze though. Pry the deepest and wettest combo I ever saw was RMG with two layers of Natty's Blue on my friends black e39 M5, wow!