Tough one. It has to be affordable, because it would be bad to be locked in to something I can no longer afford. Uigeadail is kinda borderline there, due to a variable and sometimes high price. Lagavulin is better, in that respect, but the quality is (perhaps strangely) more variable than Uigie. Maybe the Laga DE would be a better bet. And probably more likely to remain on the shelves for a long time to come.
On the other hand, Talisker 10 would be safe. Not as complex as the others (complexity is key, over the long run), but really, could I ever get tired of Tal?
I'll go with the Lagavulin Distiller's Edition.