Black hole isn't a wax its a glaze to improve look, by filling light swirl marks. SRP is alright as an all in one polish and wax but has little cutting ability and again will mask by filing the swirl marks.
I use HD wax from AG and have had good results, and the protection lasts a decent period of time. Alot of people rate collinite due to the time the finish lasts, I have no personal experience but alot of people recommend it.