Ahhh. There are so many choices. I like peaty scotch, so some of my Favorite include Lagavulin, Ardbeg and Bowmore. Then I had Port Ellen.
Also an Islay malt, unfortunately the distillery was closed in the early 80s. There are still some casks kicking around, so most of what you will find has been bottled independently.
I've only tried 2 different bottlings Port Ellen, and that was during a scotch tasting where we got to compare the two. Both were great, smokey, tasty and very well balanced, but this is the one I had to buy. It was a very special treat for me and the most I've ever spent on a bottle (~$250).
If you ever get a chance to try it, do so.