Instead of getting a smaller case and trying to cram in selected modules to achieve a specific effect, why don't you try "thinning" your rack by removing modules that you are underusing, or that intimidate you, or that are pushing you in directions you don't want? Put them in a drawer and see what you can do with the ones that remain. Repeat and swap as needed. That costs you nothing, you can get started in ten or fifteen minutes, and what you learn can inform future purchases (if any are needed).