Down Jacket Options

I have the full-zip version of the LUL Pertex Down Jacket, and I've been really happy with it so far. I really like the Endurance fabric and the little features like a hem drawcord. The hood is very puffy and comfortable on your head. The only thing I'm not totally sold on is the stealth pockets. The stealth pockets are not insulated on both sides and don't seal as well as I'd like. I've also had trouble with things falling out of the pockets, seems like they are just meant to warm hands, not for storage. My size large weighs 10oz in the stuffsack.

While a couple oz. out of your range, I have a Sierra Designs DriDown Hoody and have been very happy with it. It's got 4.23oz fill, and weighs 11.85oz in Medium. Full zip, hood, and pockets. Streamlined/slim fit that still allows for layering underneath. No experience with the jackets you listed, though.

Arc'teryx Cerium LT hoody? I think it's just barely in the range you're looking for.

I have a cerium hoody,and its great. Probably my favorite down jacket I've owned for the excellent and efficient fit. Having the three jackets you mentioned, all that close in weight/function would give me too much room for indesicion when trip packing, though. I think an ex light anorak and a mirage would be a great all seasons UL combo. I think the ex light lends itself well to trips where you want the absolute lightest most compact kit, which most often, for me, is when i'm running or day hiking with a running vest, but also SUL style trips. This fall I've enjoyed the combo of the ex light and microfleece pullover for the added versatility. I'd be less likely to pack the fleece if the anorak wasnt so light.