Alex, so you know exactly what the French are like.
As for the WBBB + Snugpak I haven't tried another UB but I think the two are perfectly matched. In winter (or early spring in the UK) with the mozzie net folded away, the Snugpak is wide enough to come all the way around the hammock like a peapod, and has little hoops that I've fitted mini carabiners and elastic to to keep it shut around me. Only below zero have I needed a top quilt as well!
Send me a PM and give me a little while since I'm on the road, and I'll show you a couple of images of how I set them up together.
If you haven't bought the Snugpak yet, shop around. There's one site that sells it ten quid cheaper than the other(s).