You probably have the best - simple and they work well.. can i purchase an 1 pack sample?
I sometimes use Nitis and there are times they work very well. However, they are extremely light so they don't work as well for me in deep water or heavy current. I do not believe in adding split shot to artificial lures as it impedes the action.
I'm a big believer in homemade spinners as most commercially made spinners are made from cheap wire and bend much too easily. There are a couple of exceptions of course.