what's his budget? does he want a full tower or something smaller?
really nice affordable full tower case is the NZXT Switch 810, it comes in Gloss White, Gloss Black, Gunmetal Grey, and Matte Black
amazing ITX case is the Bitfenix Prodigy, check out what this guy did with one:
XI Wiki



? It's really not much harder than that. You'll probably want to check your motherboard manual to see which pins you connect all of your front panel stuff to, but otherwise even if you've never done it before, you should be able to figure everything out. Everything is either labeled on the motherboard, or there's only one possible option to connect things to (and probably still labeled anyway).