Right now, I have Macallan 12yr, Balvenie 12yr Doublewood and Lagavulin on hand. There's still something special about the Balvenie Doublewood. It's just... what's the word I'm looking for here... "luxurious"? The Macallan 12yr is aged 100% in sherry casks and The Balvenie Doublewood is only finished in sherry casks but the Balvenie offering seems more complex and refined somehow. That isn't to say the Macallan is less than impressive! One thing I highly enjoy about the Macallan 12yr is that it seems to have a more "woody" taste to it. Then there's Lagavulin. I can't say whether Balvenie Doublewood or Lagavulin is my favorite since they're incredibly different.. but Lagavulin puts up a great fight. A small sip of it is like a train pushing down your throat. It's huge and powerful.. smoky and salty. It's soothing, warming and rejuvinating. The finish lasts for miles and seems to hang around for hours. I admit I did not like it the first time I tasted it but liked it the second time and loved it by the third. Since you already have a Macallan scotch, I wouldn't suggest the Macallan 12yr or Balvenie since you have your sherry-casked scotch. I WOULD highly suggest trying an Islay malt like Lagavulin, though. Once you grow a taste for it, it's unbeatable. It'll give you a nice change of pace from the lighter Highland Park (but everything seems lighter compared to drinks like Lagavulin and Laphroaig).