Gliderguider is dead spot on with my impressions (to the extent that I have had experience with the brands he mentions). Lagavulin is my #1 fave, but I do stray for variety's sake, every now and then (including single-barrel bourbons and cognac). With regard to blends, the Chivas Regal 18 year old Reserve is quite nice, as is Johnny Walker Blue.
Tom.
Tom.