My general feeling is that you don't, as a novice, attempt to buy a wine expert - wine. As a corollary, I would recommend you don't buy him Scotch...but perhaps something closely related you might know something about - be it whisky, vodka, etc.
A good scotch drinker probably likes other things as well. Like B&B or another.
"I would recommend you don't buy him Scotch...but perhaps something closely related you might know something about"
Good point. Get some Drambuie.