With the onset of cold nights in the Sierra Nevada, I'm thinking that I'd like to add a vest to my layering system for camp/rest and sleeping.
Right now I'm pretty comfy into the mid-30's wearing a base layer, hat, light gloves, a Marmot DriClime windshirt, and adding my TNF HyVentDT rain shell (hey, got it wholesale, so what the heck) for added wind protection. (I also sleep in a WM Megalite, often with the DriClime.) Thrilled with all pieces so far, generally speaking.
I'd like to be comfortable down to the low 30's and high 20's, and I'm thinking about adding something like a WM Flash or Flight vest to the ensemble, or maybe a MicroPuff vest.
My main concerns are fit of such lofty layers under the DriClime (which does fit me on the looser side), and which of these might keep the ol' torso the toastier. For example, the Micropuff has an amazing rep and seems is a great value, but the WM Flight vest, while pricier, has 2" of loft (coming back to my concerns about fit).
I suppose I could consider ditching the DriClime and just getting /one/ heavier outer layer, but I like the flexibility of having an additional insulating piece to fine-tune how warm I am in my down sleeping bag...and I hate to ditch the investments I've already made in my existing clothing.
I don't have access to a local store with these pieces in stock to try on, compounding my choice paralysis, so I figured I'd ask for similar experiences, recommendations, or insights on picking a vest for this kind of usage...