if he's looking for straight pow skis, try the volkl sumo. Those are massive and should be excellent. Depending on where at whistler, he could also peep the volkl sanouk with the swallow tail.
unless he's going heli skiing, my guess is that he'd want a good big mountain ski that can handle the pow when it gets deep. My vote in that case would go to the seth pistol, made'n, legend pro, king solomon, or even armada ant.
good luck