For 18YO, I find Highland Park to be one of the best. Not as bold as a Balvenie 17YO ar even a Glenfiddich 18.
If you are looking for something amazingly smooth, I will admit, a bit pricier, check out a Glenfiddich 21. Glenfiddich tends to be a fruitier, sweeter whisky and the addition of the rum finish gives it this just amazing, rich and slightly sweet taste. For a little less, check out the Balvenie 14 Carribean Cask.
Another interesting choice would be to look at Kavalan. They have a portwood finish that will be in a similar price range as many 18s that is amazingly smooth. One of my favorite whiskys in the world for the money.
If you are looking for something amazingly smooth, I will admit, a bit pricier, check out a Glenfiddich 21. Glenfiddich tends to be a fruitier, sweeter whisky and the addition of the rum finish gives it this just amazing, rich and slightly sweet taste. For a little less, check out the Balvenie 14 Carribean Cask.
Another interesting choice would be to look at Kavalan. They have a portwood finish that will be in a similar price range as many 18s that is amazingly smooth. One of my favorite whiskys in the world for the money.