There is always room for one more soap. It is a scientific fact. If X is the number of soaps you currently have and Y is the perfect number of soaps then X + 1 = Y. Quite simple really.
I have over ten soaps now. I have decided that is too much. So whether you need more soaps depends on your point of view. I would be happy to end up with two or three good soaps. That is also how I started before I found the shaving forums