Laphroaig (not medical enough), Ardbeg (availability) and Kilchoman (age) can be excluded. If it were a Bowmore, it would be a very smoky and unusual one (but there are also). The light farm or stable note reminds me more of peaty laddies and / or bunnahabhains (although I have no idea whether the former gave off barrels or distillate or how the latter turn out in old age). In terms of sweetness, it could be a dirty - or rather unusual - Lagavulin, or just a Caol Ila, which is probably the most likely.
No matter how you decide the guesswork for yourself: very tasty, tasty and round, and definitely more than okay for the money.