I am about to place an order for a new quilt / bivy system and wanted to try and get some experiential based feedback.
The first up is choice of down type. All the katabatic gear quilts are offered in 900fp and 850fp water resistant down. I'm leaning towards the traditional down, but is there any reason not to go with water resistant down at this point? I plan on ordering the 40 degree chisos and maybe a 15 degree sawatch later down the line. It will be primarily for hiking in the NE United states / White Mountains, etc.
I've read some posts that recommend going with synthetic for a summer quilt just for the fact that is easier to wash. Would it be any better to go with a 40 degree EE prodigy? The other benefit I could see going synthetic is I could use it to supplement my down bag in winter to protect some against condensation. But, I'm not convinced I would carry it for this purpose.
My other questions lie with the sizing of the bristlecone bivy. I would like to have one bivy that I can use the majority of the year when needed. I've read that the bristlecone is generously sized, even in the regular width. However, in the winter I use a large neoair xtherm which has a 25'' width. Website lists that this would require a wide size bivy. Would I be swimming in this thing any other time of year or with a CCF pad alone? I should probably note I'm quite thin (5'11'' and 155ish) and a pretty solid back sleeper.
Any one have some input? I'm hoping to place an order in the next 24 / 48 hours. Thanks!

