Everything I have heard about the WBBB is excellent, I think you will be very happy with it. I have not tried one though. The OES maccat tarps also seem to be very well received. I would love to hear a review from you if you get a UQ made from IX, pics too.
I am using myog 1.1 single layer, removable bug net ( only covers top half of me, and just hangs from ridgeline ), and a 5x9 sil tarp (just barely enough coverage, would be miserable in a hard rain with wind), and 7/64 whoopies.
My total weight for tarp/guylines, bugnet, hammock, whoopies, ridgeline, treestraps, carabiners (will swap for softshackles) is 23oz.
I have removed quite a bit of extra cord, trimmed my bugnet, and shortened my hammock since I weighed everything. So I should be lighter then the 23oz. I will have to weigh it again.
I am starting my UQ tonight. Tried the pad and it doesn't work for me.
If all goes right my UQ should be around 12oz.
It looks like you are heading in the right direction, good luck.
Let us know about the IX UQ.