Decided on Fabric!
Thanks for your input on "masculine" window treatments. I've fallen in love with this fabric, and when I showed DH he liked it too (it's always good to get buy-in, I find, even if I know it is my call). I like how the aqua will play off the walls, but the fabric also introduces some new colors! It's also geometric, which I find more "man" friendly and friendly to a shared space.
Now I just have to decide whether to pay someone to make the valance. OR buy a sewing machine, order the fabric, then make a valance with a matching pillow for the chaise.