The only thing I would suggest buying right now are Cabela's fleece lined pants. I want a pair bad, and I'm going to buy a set this weekend.
Don't buy him anything else - get him a gift card. Why?
I'm picky about my hunting clothes. Where are the pockets on the coat? where at the pockets on the pants? how do the coverall-pants cover my boots? do my pants feel comfortable inside the coverall pants? How loose are they - can I wear extra layers when it's below zero?
I'm guessing any male hunter probably has at least half the issues above when they get their hunting stuff.