Souveran is a great wax. I like it a lot on my black car. There are a zillion quick detailers out there, and I imagine that all would be compatible with your Souveran. After all, they don't really add that much, and when one is using a good carnauba, I'm not sure one really wants them to add very much. It's sort've like pouring ketchup on a filet mignon.
I would probably go with Megs' Quick Detailer. While I had Souveran on my car, I used Sonus's Carnauba Spritz after washes. It seemed to compliment the Souveran well. Adhering to the principle that the less touches the better for a black car (especially one with soft Honda paint), I only resort to a quick detailer in-between washes if required by bird droppings and bugs.
Cheers,
Al