So I just got a Strafe Exhibition jacket which is 60g of insulation vs the 100g in the Highlands. Both have the 3L Polartec Neoshell and the Polartec Alpha. I really really like it so far and could feel the difference doing top to bottom runs the other day at ABasin...stayed less sweaty for sure. It was mid 20s and all I had on under it was a Patty midweight cap.
However, on the upper third of the mountain, where it was upper teens and there was wind (probably 20-25 mph, so about 0° windchill), I found because of the breathability of the jacket, I was pretty cold. I could feel it coming in.
I'm concerned I will be uncomfortable later this season on days when it's between 5 and 20, even with an added midlayer. I have a Patty R1 and a Black Diamond midlayer jacket that's similar to the Arcteryx Atom and has a pertex wind proof shell. I will obviously try these out and see if they help with that temp range but I want to see if I should be looking for a different insulated hardshell jacket that's wind proof to begin with?