The ALS is great if he might let a smaller statured person shoot it from time to time.....wife? kids?
A buddy has a 912. LOVES the gun, but he has had problems with it. 2 broken hammers in less than 5000 rounds. I've also "heard" that when the CZ team went down to Argentina last year they had hammer problems with the 912s. Curiously, the hammers in the 912 are the same hammers found in the 712.
All in all, he should pick the one that fits him best.