OK, so I'm gearing up a winter trip, most likely in west Texas around Christmas. Most likely low temps will be in the 20s.
I used the Mountain Hardwear Phantom jacket last year, but it weighs in at 16.25 oz including stuff sack. Do you think the Montbell down jacket would suffice for campwear? At half the weight, it is tempting. (Plus, it's on sale right now, too!)
I should mention that I will likely be wearing the following in conjunction with the down jacket:
REI MTS midweight base layer = 7.5 oz
Patagonia R1 pullover = 10.1 oz
REI Ultralight rain jacket = 12.5 oz
Last year, I was barely on the side of warm with my Phantom down jacket, so I'm a bit leery of going less.
Feel to make other suggestions about swapping other torso layers to go lighter.

