You really ought try to get him into Best Buy and steer him towards some KLH. The sound and build quality is the same, but he'd only spend about a tenth as much. Sure they sound crappy, but so do the B(l)ose. And the KLH rig is just as small. I'm not joking here; if he dsn't care about the sound he may as well save some money.
Funnily enough, years ago an aquaintance of mine had some B(l)ose 901's. When the foam all rotted out, I tried to convince him to buy something decent. But OH NO, B(L)OSE IS THE BEST! he cried. Eventually I steered him to a refoam kit, and he spent all his spare time over the next couple weeks refoaming them. Well, eventually I talked him into stopping by to check out my speakers (some Monitor Audio's) and he was dumbstruck- he couldn't believe how poor his sounded compared to mine. Long story short- he ordered a pair just like mine
the very next day! Years later, he's still using the Monitors, and the B(l)oses are being used in the workshop in his garage.
Hmmm....I guess the morale of the story is that sometimes even a complete "B(l)ose Zombie" can be turned from the dark side when exposed to something better (which of course, includes almost any other speaker!

).