Obviously, if you're husband drinks single malts regularly you're not going to get him the Glennfidich. It is the best selling single malt and for that reason he's probably had it and besides that's like buying a beer lover a Miller lite! I would give your friend a dollar amount and have them ask around at some Scottish pubs for their recommendations.
I, personally, am an Islay lover and have an affinity for the Laphroig 15 yr. But that's just me. Go with the locals and be adventurous.