OK let me clean this up a bit...I appreciate the advice thus far, but here are some more details:

-I was linking to those two jackets to show my frustration in evaluating two similarly priced jackets but not really knowing which would be warmer when u only have fill power and weight of the jacket to go on.

-I was wondering if -20F is the temps I'll see during the day when loafing around camp or at night...to be honest I'm not really sure. I just know my friends saw -17 last year in February near Saranac Lake in the Adirondacks (Northeast). I'm fine with planning for -20 during the day, it'll give me some head room just in case.

I'll possibly be sitting around a lot, not generating a lot of heat during the day around camp, no real hiking to speak of...I want to be warm. I'm not sure if the snow will be 'wet' at those temperatures and have it soak into my gear or not, that's also a concern.

I've narrowed my search to three jackets/parkas, here are my questions:

-Which would u pick?
-I read reviews of the synthetic DAS lasting many years, but down should last even longer?
-Down be a PIA to clean vs. the synthetic?

Sherpa Adventure Gear Men's Khumbuche Down Jacket
http://www.campmor.com/outdoor/gear/Product___75113

Pros:
Love the green color
cheaper than others

Cons:
Not as warm as Patagonia Down Parka (750 fill vs. 800 fill)
Perhaps not as warm as Patagonia Down Parka?
It's a jacket, not a parka, less coverage?
Don't find many reviews on it...untested?
Down sucks when wet.

# Length: 27-½”
# Weight: 22 oz.
$188 shipped

Patagonia DAS Parka
http://tinyurl.com/66mmnc

Pros:
Rave reviews
Synthetic handles wetness better

Cons:
Down Sherpa jacket or Patagonia Down Parka could be warmer?

Length 29 inches
Weight 780 g (27.5 oz)
$220 shipped

Patagonia Down Parka
http://tinyurl.com/6f5pw8

Pros:
Rave reviews
800-fill down...warmest of the three I'd assume.

Cons:
Down sucks when wet.
weighs the most.

Length: dunno, but figure it is similar to DAS Parka
Weight 868 g (30.6 oz)
$227 shipped