Hmm, apparently I am pretty much on my own here.
However lets post it anyway.
I also find the F&F Mortlach a good whisky, but I would deffinatly not go to extremes as stating its the best sherried malt out there, nor compare it with the Macallan in general (perhaps with the 12Y old). I would however compare it with the Dailuaine F&F bottling. Looking at my notes from a Mortlach tasting a while ago I notice its the second best Mortlach i tried, rating 85 where the Murray McDavid 1990 rates 87. However all the other Mortlachs i tried rate only in the high 70's.
It is more then decent but there are other distillerys out there that supply just as good if not better bottlings with a more consistent nature. Glenfarclas is one example.
Just a look from the other side to add some balance