Reflex Silver is definitely my pick of the colours for the mk8. In the flesh it's head and shoulders over the others, but I've not seen Atlantic blue.
The lack of comments on dcc was frustrating but i think you'd need to test it both with and without to get the real answer.
Also that car had eighteens retro fitted with non mk8 nineteens on it. On the mk8 the suspension is tuned for the wheel size in the factory. I think it would be unfair to comment on the ride much under those circumstances.
My test drive of the normal gti on eighteens was perfect without dcc though...