As some others have ponted out - a lot depends on what he wants to hunt. 7.62x39 is quite adequate for much North American game, which reminds me... did you ever make it to the range with that SKS you picked up... for him? If you did, and posted an eval, I must have missed it. Lots of folks hunt with these - scoped they can be sufficiently accurate out past 100 yards or so (about the max you'd ever need in this here eastern part of the US).
Finally got mine (a '54 Russian) the other week. Been cleaning (and fondling) it but haven't made it out to the range as of yet. Can't wait - she's a beaut.
Of course, if the motivation is to pick up another gun... well, that's always a good reason