After reading many posts regarding WT, The KS has been mentioned more than a few times regarding it getting younger and maybe less flavorful.

Pewter > Dark Wood > Light Wood

Has the same happened to the Rare Breed (I think I've seen some posts about this too) and what years/batches might I look for.
I assume earlier will be better than later but how far back do I have to go to find some great whiskey as opposed to some good whiskey? I don't have any RB in the bunker yet but I have a few other Turkeys and would like to round out the collection with a RB and maybe a No. 8.