I'm building a CP now that will have 2 8way sticks with 6 buttons.  I added a dedicated 4 way basically for pacman, but I'm not sure what else I would use it for.
Are there any good games that require a single 4 way + 1-2 buttons?  I think most good games that use a 4 way + buttons such as galaga, astro blaster, donkey kong, load runner types etc, should play great on the 8 way.  Is that true?  I'd rather avoid the clutter of adding dedicated buttons, but if there are enough good games that really need the 4 way plus buttons, I could add it.