Can I vote for metal-inspired anodizing colors, like rose gold, copper, bronze, pewter? I mentioned it in the EXS IC, but I think those are great for layered case options. "Space gray" is a relatively good approximation of stainless steel, so I'm glad it was an option for EXS (would be even more interesting in a brushed finish rather than sandblasted.) In general some less common and less pure colors would be cool.