It's the same expensive the 4 was, and is faster. The MacBook Pro is significantly more expensive, heavier, and serves a different purpose. Your criticism might be valid if he bought a surface pro.
I could probably do a representative sample:
Ellie Goulding - Halcyon
Cowboy Junkies - Caution Horses
Iggy Pop - Raw Power
Paul Bley (featuring Ornette Coleman) - Live at the Hillcrest Club
The Beach Boys - Pet Sounds
Arvo Part - Tabula Rasa
Pink Floyd - Animals
The Flaming Lips - The Soft Bulletin
Mos Def - Black on Both Sides
Hal Wilner - Whoops I'm an Indian
But I don't know that any of those are really in my top 5. Or even in my top 10. It's a pretty good slice of what i listen to tho.