I agree with trying to avoid 2hp modules when you can. Especially in a small rack and right next to each other. They become very difficult to work with. I also like to get utility modules that do more than one thing. As long as you don't need all the features at once, they can make a nice toolbox to play around with. Once other thing to make the setup look a little less cramped, and this is just a visual thing, alternate light and dark modules in the case. When you bunch light and dark modules together, they can appear to meld into one another.