What does your outfitter recommend? He'll have a list for the season you are hunting.
Horseback or on foot? Don't need a meat hauler for a horseback hunt most of the time. Just a good 2500ci day pack.
Rifle or archery?
I like to mix and match based on temp. The name brands have a few items I like, and a lot I don't. Don't focus on a brand. Focus on getting each piece that works for you. Sitka made gear that worked for their testers as did Kuiu. If you didn't test it, it may not work for you. I wouldn't do a 3-1 parka unless it was going to be near 0 temps. Too hot, and they are heavy. Camo is overrated. Earthtone solids are just as good. On most rifle hunts, you get to wear orange anyway.
Critical items. Boots, socks, optics, rifle. Boots should have 50 rough miles on them to be considered broken in. Real hiking miles, not town, at home, in the yard, at work miles. Search for good brands on the forum. I like Darn Tough and Lorpen socks. Anything Leica and Swaro make at any price level are solid optics. Meopta is probably the sleeper of the optics world. Great for the money. Vortex mid to high are good as are Nikon's Monarch lines if you want a good pair of binos without killing the budget. $500-700 will get you a very usable pair of binocs.
Just a few thoughts.
Jeremy