The best original-bottling for me was the 1975/2000 (the range had 4 diff. bottl. 1998, 1999, 2000 and 2001).
In 1975 the maltings of Ardbeg delivered the original basics for the stills. The 1977 ist more like the 22yo. Port Ellen RMS. More coal and medicine. I think the reason is the undermixed industrial malt from Kircaldy this year.
The Signatory 8yo. of 1991 had a lot of power.
But the very, very best Ardbegs I tried were the 1972s of Douglas Laing. I'm not so good in description but thats God's own nectar. Iodine, peat, coast. Heavy, deeeep and with a high quality.
These bottlings were made for Germany and had roundabout 220 btls. per cask. The strenghts were 50.1%, 49.5% and 48.8%.
In Germany they are availiable in small stock. Ca. 150 Euros each. But it's worth!
P.S. Complete Ardbeg-Bottling-List (Port Ellen too) with Shop where to buy is at www.whisky-files.com