Laphroaig, Ardbeg or maybe the distillers editions from Lagavulin and Talisker. Islay is pretty small so you don't really have that many options.

Since you like Macallan (I assume sherry oak?) you might like one of the older Glenfarclas (for the example the 25yo).

I don't know how whiskies are priced in the US but the "cheapest" whisky I like is Tullibardine 228 (burgundy finish). I think I payed 30€ for it. Glenmorangie Quinta Ruban (port finish) is also very affordable.

Aberlour doesn't really fit in here but the 15yo and 18yo are worth checking out if you haven't already.