I am going for the softest options with the orion (at least I think it makes for the softest typing feel). 60g gateron blacks, plastic plate and flat acryllic bottom. Hope it turns out well. If the price is right maybe I'm gonna get a SS or alu plate just in case.
As for the shelf liner... I have foam in my Viper which was used to secure it during shipping. I am going to remove it tomorrow and come back to you. I only have blacks in the modifiers though, so it may not be the most accurate result.