I've tried a lot of different clothes from the brands mentioned, and have pretty much settled on what I like.
Never tried any of the hunting pants mentioned though.
For a non-camo pair of pants that will last, stretch, dry quick, and are very tough, you can't go wrong with a pair of Champion C9 golf pants in railroad gray. Don't think they make them anymore, so I get them off the auction site for $15-$30 delivered. I also wear them for work, play, Sundays, etc.
Have finally found a set of rain gear that I absolutely love, the First Lite SEAK (South East Alaska). Jacket is just the right weight, fits well, lots of zippered pockets. Pants are very tough and a real weathershield. Some noise with both of course, especially the pants, they practically could stand up on their own when new. But not too bad for noise for solid rain gear.
The SEAK coat is nice enough and breathable enough that I just wear that, rain or shine.
The SEAK pants I wear alone if I'm not climbing too much or if the weather is likely to be nasty. Can save weight that way.
Colder weather I sometimes take the wolfskin pants from Gray Wolf woolens.
Another set of pants that I sometimes bring are Patagonia primaloft pants, think they were made for Special Forces. In olive green. Full-length zippers so you don't have to take your boots off. Extremely light weight, great for putting on if your're gong to be glassing for hours on end in cooler or cold weather. They don't take up much space in the pack.
A great siwash parka is a Patagonia DAS (dead air space) parka, filled with primaloft. Mine is olive green, maybe weighs 1 1/2 lbs and goes into a tiny stuff sack. Weather goes south and I just pull that out and all is good again. Warmest coat I've ever owned.