Will put together a picture soon, but found some interesting dusty malts when out bourbon hunting with michaelturtle. I am not a scotch expert, although I do know what would be major dusty scores (Ardbeg 17, Bowmore Sea Dragon), but I thought this wasn't too bad. Don't know much about the Glen Keith or Longmorn.
From the mid 90s:
White Horse Lagavulin 16 OB
Talisker 10 Map Label OB
Glen Keith 1983 OB
Longmorn 15 OB
Glenkinchie 10 OB
As well as:
Ardbeg Airigh Nam Beist (Bottled 2006)
Glenlivet 12 (for $13)
The winner on that list is the Lagavulin 16 - by all accounts the white horse editions were fantastic and miles ahead of the subsequent versions.
Longmorn 15 is also a good score - again by all accounts much better than the current 16yo.