Dynaudio became available on the R from build week 45 - 3rd Nov 2014 onwards (MY15), so if you are looking for an R with the upgraded sound, it needs to have been built from that date. I delayed my R order until Dynaudio was available and they had sorted out how to fit the sub in the boot with the haldex system.
I personally think Dynaudio is fantastic and one of the best very value for money options offered. Once the speakers are burned in, it develops a rich velvety bass, and sounds fantastic through the whole range. If I could have only specced one thing on my R, it would have been Dynaudio.