At that elevation make sure you have Diamox. It can make or break your trip.
As far as boots go, I've had good luck with Kennetrek Mountain Extreme's and Mountain Guides.
I hunted Kyrgyzstan in August. Weather ranged from 75 degrees and sunny to 15 and a full on blizzard. In the same day.
You're going to want a good spotting scope. Be prepared to take long shots and make sure you have a range finder that compensates for angles.
