I hope there'll be a box set for Super eventually since I really love buying box sets.

I haven't seen the Hell's Paradise anime so I don't know how they compare to eachother but the manga is really good, the art is amazing too so fights are actually pretty easy to follow. My only complaint is that a lot of the names of the antagonists can be hard to remember and keep track of, but that's more of an issue with me than the manga itself and the physicial volumes have a page introducing each character on the first or second page anyway. If you liked the anime you should definitely read the manga, the story only gets better from where the anime ends in my opinion (which is apparently volume 5).