Very nice and I like the colour, a few manufacturers are doing similar colours to this at the moment, Ford offer the ST Focus in "primer" grey. I think you made the right choice out of the 3 possibilities but to be fair to the Focus RS it's not really a like for like comparison as it's probably about £10-£12k cheaper but I'd definitely prefer the Audi over the Merc.
Hope you enjoy it and get some more pics up.