I'm looking at getting a winter bag rated at 0F with around 600 fill power down and a max budget around $270. The LL Bean 0F down bag seems like a good price, but I'm guessing that the comparable Marmot Never Summer bag quality is higher?

Anyone have experience or insight into LL Bean down bag quality? They don't publish detailed specs like loft and fill weight, so that makes me suspicious. I'm leaning toward the Marmot.