At an event last night that I've written about elsewhere in another context, we tasted some Ardbeg Uigeadail. This is an unfiltered, 108.4 proof single malt named for Loch Uigeadail, the source of the distillery's water. (Ardbeg is on Islay.) This stuff is as flavorful and unsubtle as any bourbon. Very strong smoke scent, and smoke not char. When the presenter, Karen Fullerton, suggests adding water she describes what dilution does for the spirit as "like charming a snake out of its basket."
I had tasted this same spirit in the Spring at another event and it didn't make much of an impression on me. It sure did this time. All of the Ardbegs, including the Uigeadail, seem to have a cleaner finish than most single malts, which is something I like about them.