Right now I'm working on a storage solution which will take up about the same amount of space as 3/4 small boxes and hopefully 2 large boxes. There are three aspects I'm trying to balance as best as I can; setup time, game play benefit, and volume.
As of right now, my small box monster cup is complete. ALL the monster tokens are readily available for drawing purposes, Mask and Spawn monsters separated into their own little compartments.
As everyone knows Arkham Horror is a beast of a game.