I like scotch quite a bit and have 30 to 40 bottles at any given moment, ranging from sherry bombs like Aberlour A'bunadh to heavily peated stuff like Ardbeg Uigeadail. I have a bunch of weird shit too like independent bottlings of Linkwood, Imperial, Mortlach... well, a lot.
If he's not really scotch drinker and this is just a gag, I'd go with the Dewar's 12 rec. Famous Grouse is another solid, inexpensive blend that has enough Macallan in it to make it pretty easy to deal with. Monkey Shoulder is a little more expensive, but also a really good and reasonable blended scotch, though it's a little less sweet, more along the lines of a Glenfiddich (which is more than likely still used in the malt) or a Balvenie. It has a Speyside character to it for sure.
For a single malt that is tasty but inexpensive, Aberfeldy 12 is pretty tough to beat. It's a mix of whisky aged in sherry and bourbon, and has some notes similar to other rich but not particularly smoky scotches like Aberlour and Macallan and can often be had for under $40. For something with a little more hair, Highland Park Magnus is pretty good and is relatively inexpensive. Every now and then, you can find Highland Park 12 for about $40, depending on your state.
All in all, if I was getting a casual scotch drinker a bottle of something on a lark, I'd probably get the Aberfeldy.