Costco has a good reputation for private labelling and, of course, Macallan's has an even greater reputation all its own. The single best scotch I ever had was a glass of their 25 year old in hotel bar in Austin, TX. Try it and tell us what you think.
Well I've tried it twice so far and I gotta say it's really good. Ive been a Johnny walker black drinker, and I will continue to be but only because I can't afford to keep The macallan in the house permanent.