I want to go for Black Shiny. Here's my reasoning
Black - The ARB isn't visible at all apart from during maintenance and MoT. Might as well go for black as it will be more forgiving with dirty paw prints and minor oil or grease drips/smears.
Shiny rather than Satin - Easier to wipe away any significant oil/grease. Additionally, in a few years if the rubber in the mounting bushes starts to deteriorate at all, shiny is less likely to start sticking to the bush than satin, I know its only microscopic movement but...
Looking forward to getting this - right now my car is at an extremely trustworthy nearby garage having AC springs fitted, an AC steering rack fitted, the suspension lowered by 15mm and once all this is complete, the geometry set to AC specs (thanks to Phil/Contigo who had published them here on SM). Whilst this looks like overkill, the suspension needed to be broken down anyway as the spacers at the top of the front spring/shock assemblies were badly corroded and in imminent danger of collapse and research had revealed thet AC springs are a fraction of the price of regular springs - go figure!
Huge thanks to Dave for pulling this together and Matt for facilitating the finances etc..