As long as it isn't shiny... I like it in black. Most people do by the way (just look at the TOHKBD2 order list).
As for memory, 16GB is too low for a starting level. 32GB is the bare minimum in my opinion.
Why go for three flavours at all? This only adds complexity to the situation of getting to a finshed productline.
64GB and 128GB are perfect as long as the ability to expand by using an SD card is available.

Scope is creeping...