Bag for moose hunt?

[McCree]

I've used a Marmot Pinnacle 15 degree down bag for 15ish years on western hunts without issue. I'm headed to AK for a drop moose hunt in Sept and thinking a synthetic bag might be a good idea. I like what I've read about the Kifaru slick bags and I like the center zip option but would like opinions on this bag and others as well as temp rating recommendation.

Thanks!