Laphroaig (not medical enough), Ardbeg (availability) and Kilchoman (age) can be ruled out. If it should be a Bowmore, it would be a very smoky and unusual one (but there is also one). The light farm or stable note reminds me of peated laddies and / or bunnahabhains (although I have no idea whether the former gave up barrels or distillate or how the latter turned out at that age). In terms of sweetness, it could well be a dirty - so also rather unusual - Lagavulin, or just a Caol Ila, which is probably the most likely.
No matter how you decide the guesswork: very tasty, tasty and round, and definitely more than okay for the money.
Edit: after trying several times, I type on Lagavulin, and increase from 85 to 86 points. A real bargain for the quality.