Yes. An 8 ball has the same issues as super black pastel and super cinnamon.
Sorry, I don't know the price for a super GHI/mahogany, but I imagine they're *very* expensive.
Panda Pied is a Super Black Pastel Pied. Using any other morph will not make it a Panda Pied. A Super Cinnamon Pied is a White Panda Pied.
My advice would be to just use a black pastel/cinnamon. Yes, they have a chance for defects, but remember that many people have successfully hatched out healthy defect free animals. It's just one of the things you have to deal with as a breeder.
(and note that a super cinny is brown, not black)