Availability? As far as sherried Speyside whiskies go, I would replace Mortlach with GlenDronach in that question. I've never been able to walk into a store and find any Mortlach, aside from a random IB now and again.
While I love Mortlach, Trey is right about its availability. Hopefully we will be getting the full lineup from Mortlach on the shelves here in the next few years.
Glendronach is a good alternative to Macallan as (again) Trey has mentioned.
¡Geaux Tigers! - ¡Visca el Barça!
"Really though, my hands are sore. The tool was doing it's thing with a flex hose." -Barrel_Proof