frame finish: unpainted carbon is always covered with a matt or gloss clear coat to protect it.
I'll go with a raw (non clear coated) one because I'll paint it DIY with 2K spray paints.
As for fork choice, I had experience with Pike, Lyrik, DVO Diamond and XFusion. If I were you I would look for some discount next months: 2021 models will come soon and due to international crisis some big shop has just started with big deals.
By the way I would stay in the 44mm rake.
Kydex
I've never used it yet, just arrived in my hand and will try to make a fork fender out of it, to make some practice.
Downtube protector will be molded direct onto the frame before I'll paint it.
Will shape it in the right size with cutter/Dremel, heat as per instructions and place on downtube.
I think mine will be longer than Santa Cruz one.
If someone won't go for Kydex or drill and rivet the frame to fit the originalprotector, RockGuardz have a carbon skid at 40£.