Sheps, I think you are being hoodwinked into signing up early. In all the time I've been on this forum I've never heard of an E90/E91/E92 taking longer than 3-4 months from order. Mine was 3 months from order.
In terms of colour, I would go for black with the coral. The black looks great and you can see the M-Sport lines when its nice and clean! White and coral might be a bit of risk in terms of resale value, but it would look flash!
Good luck!