These two sitka jackets are more similar than you think. One has a fleece lining, the other not. (stormfront vs coldfront)
I've worn the 90% and Celsius for several seasons now. I pack a HH suit if I really think I am going to get soaked.
For her I would get icebreaker under a kelvin jacket under the cold front. I use a similar set up for duck hunting in the pouring rain.
I'd use the one without the lining because I would want to use the jacket early season.
The pit zips and lack of noise make these jackets shine.