I don't know about the alien imp, drop the makers an email and ask them if they can anno it in any specific custom colour based on your specification.
Again, there is no colour that looks 'best', it's all down to personal preference and what floats your boat. Personally I'm a fan of really nice deep blues, but recently I've been having affection for some of the nice red to black fades that are out there on markers like the DM4. I will say this though, that in general very high polish shiny finishes are generally a bit more susceptible to light scratches because you notice them more than you would on a dust or matte finish.