I've started on the route that Jerry G has taken. I have a lot of wool and wear KOM for most cold weather. I have an Autumnwood wool coat that is a more heavily felted wool that blocks the wind better, and that has been my ultra cold, windy day outerwear. But even it doesn't block a stiff wind, and a really cold, windy day can be downright unpleasant.
Just picked up a Sitka Gear Incinerator coat a couple weeks ago. It is rainproof, windproof and insulated. A bit bulkier than the Fanatic. Not bulkier than my wool outerwear, and not as quiet as my wool, but I can live with that. Haven't hunted with it, but have been spending a lot of time outside with it, and it's been very cold and windy around here. I'm impressed. Wind simply does not get through it and it's as warm as all get out.
My plan is to continue wearing wool when it's not windy or bitterly cold, but I'll switch to the Sitka Gear if I have to go out in a strong wind. The elevated II fabric/pattern does make some noise, but not a lot, and I can cut that in half just by moving/drawing slowly. In my neck of the woods this fall, the wind often didn't die toward the end of the day. Under those conditions, the garment doesn't make enough noise for a deer to pick up, IMO. Too, when it's below freezing, deer make a crunching noise as they walk in leaves or snow, which reduces their ability to pick up clothing noise under dead calm conditions. Doesn't eliminate it, but gives one a chance, I think.
Looking forward to giving it a thorough test next fall.