The most versatile jacket in their system for what you are discussing is the Stratus Jacket. I believe its only offered in elevated or blaze orange, but it stops the wind and with the right layers beneath it, it will work for late season. The fanatic is the other option, but that is insulated and would be warm in september.
When I was bow hunting/shotgun hunting white tails, I had this for my system:
Sitka Core lightweight hoody
Sitka Core baselayer
Sitka Merino Boxers
Sitka Stratus Bibs
Sitka Stratus Jacket
Midlayer was the Sitka Traverse Top
I had a random puffy jacket that I put under the Jacket if the temps went below 30-40 degrees.
I added a pair of Sitka Incinerator Bibs for late season, but I think I could have just got some puffy layer pants and put them under the Stratus Bibs.