Show me something that beats a natural 20 and I'll show you hateful lies.
We've taken care of everything...
I've found that everything (base + all expansions) fits as-is in the base box. Could maybe get one more expansion in there. Is it fancy? No, but it fits.
I just made a small foamcore divider area for the cards and everything fits fine (I don't have storm or dominion but there is room)