I own a Montbell Alpine Light Down Parka currently, great jacket. The Golite Bitterroot is on sale at GL for $149.99 shipped!
Montbell Alpine Parka - 4.3oz 800 fill, 15.5oz finished weight (my scale)
Golite Bitterroot - 5.3oz 850 fill, 13oz finished weight
The obvious advantage, from the facts above, seems to go to the Golite, but.....
Has anyone compared to two for warmth? Many people say the Montbell is warmer than a lot of alpine jackets just due to the baffle construction. I read one review of the Bitterroot that said it has trouble holding warmth in the shoulder area. But for that price and listed weight, I may have to replace my old trusty if it is comparable in warmth.