I've decided that after some other purchases, I'm going to pick up the Ranma 1/2 mangas. Thus said, I figure I'll go after any season sets of the anime that aren't heavy on the manga based stories. That way I'm not paying too much for the same stories in different formats.
Now I hear that Season 6 and 7 are the ones that are mostly anime exclusives. Would those two be my best bet?