Tough call - what are you currently drinking? I found the below info that might help with your decision:

The Macallan Estate Reserve: If you are looking for a Scotch with a deep character and intense palate, the Estate Reserve will be a great choice from the 1824 Collection. It gets its life from a selection of special casks that include sherry oak and a handful of American bourbon, but features traditional sherry-seasoned hogshead casks. The whisky is non-chill filtered, bottled at 40% and sells for $165/700ml. In comparison to the other two, one will notice a magnitude of flavor and great depth, though the fragrance alludes to something softer and sweeter with fruits, ginger, vanilla and citrus playing large roles. The palate is consumed with citrus and wood in a rich texture that is quite seductive and the finish takes a fascinating turn to the spicy side.

Buchanan's Red Seal: Rating: 91/100 - As reviewed by Int'l Wine & Spirits Comp. on 11/01/06. Floral and fruity notes with hints of lavender and fresh green apples. Hints of oak and vanilla. Well rounded mouth is silky smooth, rich and peaty and developing beautiful balance. Some smoky notes with clean sherry and lively spice. Long warm, pleasing. Also noticed that this is a Dalwhinnie-based deluxe blend.

Royal Salute 21yr old: Blended from whiskies matured for at least 21 years. Tasting notes: Full bodied, deep sweet fruit and nut flavours with a smooth dry smokiness. The whisky is bottled in porcelain flagons, produced by Wade porcelain, incorporating the image of Robert the Bruce and bearing a Gaelic motto which translates as ‘fidelity, stability since 1801’ The flagons are available in three colours, inspired by the jewels in the Coronation crown: sapphire, ruby and emerald.