My dad put me in wool when I started hunting at 12 yrs old. I wore wool from early season archery into late season rifle in Montana. The things that I didn't like about wool where that it was bulky, smelled when it was wet, would collect burrs, and the bottom of the legs would get matted with snow.
I moved out of Montana in my 20's and like most people got hung up on trying out the next best thing. This got me hooked on Sitka gear. I will argree that it is light weight and not as bulky as wool, and it does dry out fast. However, with that said I have switched back to wool. Why...well simply because most of the Sitka gear that I have has started to fall apart. Seams in the legs are coming apart, pockets on some of the shirts are starting to fall off (alot of the seams and pockets are glued on rather than stitched), and for me it just does not insulate as well. Plus, I was always layering it with wool underwear anyway.
I have picked up some of the Silent Predator and really like it.
Both has their place and I can see why some people have started to move away from wool. With that said I think you would be hard pressed to find better all around clothing than wool. If my life depended on it, I would choose wool over any other type of material.