Advice on backpacking quilts.

I'm interested in a sleeping quilt and don't know much about brands other than ads I read. I'm interested in the Zen Bivy. I've also considered the Warbonnet Diamond back.

I'm F, short, older, and don't want anything super heavy. Local REI does not carry any quilts, and I don't know if there are any stores where I might find quilts to look at.