Fair play. Even as a budget option it does not look very promising. The amount of down, 248g, seems awfully low. The specs indicate: "Comfort 4°C/39°F", which based on that amount of 600fp down seems hopeful.
As a very rough point of comparison a Katabatic Chisos 40\[0\] quilt has 255g of 900fp down. Which makes me think 248g of 600fp is low. I would try not to put too much importance on the exact numbers above, but there seems to be enough of difference to rise alarms as you also noted that you're a more of a cold sleeper elsewhere in this thread. I suppose you could always extend a colder bag/quilt with a down jacket, pants and booties. Pay slight weight penalty for a modular system.
Did you consider looking for 2nd-hand options?
\[0\] [https://katabaticgear.com/collections/elite-quilts/products/chisos-40-f](https://katabaticgear.com/collections/elite-quilts/products/chisos-40-f)
As others have said, the Katabatic is the choice. However the Katabatic is comfort rated, so an EE 20 is like a 30 deg Palisade. I am not familiar with PCT temps but you may be able to get away with a Palisade. I sleep warm to 20 on a CCF pad.
but that 40\* nunatak quilt has almost as much loft as most mid-tier 30\* bags. Nunatak, Katabatic, and Gryphon Gear are known for having much more conservative ratings on their bags.
Someone ditching their 30 EE or Zpacks quilt for a 40 degree nunatak quilt is really not losing much sleep insulation. You throw a puffy into that equation and now they are carrying MORE down than they did before.
all of this sidesteps the biggest hole in OPs logic though: The reason people ditch the puffy and just get a more conservative sleep system is it is objectively lighter. If you don't need the puffy jacket except while in your quilt, it is more efficient to just put that down in the quilt.
Top Outdoor Sleeping Bags on Reddit
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NEMO
Disco 15 Series
79% positive of 114 users
Spacious for side sleepers; bulky, temp rating optimistic.
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