Ok let me mention that for now I live in Texas So it's not so much a "winter" tarp I am looking for but I like versatility. I have been camping in Texas before a several times when it was in the teens to singles with high wind. This was a couple years before I discovered the wonders of the hammock. In fact what got me into it was me randomly deciding I had time and wanted to learn to weave a hammock. I was looking around at diy sites and eventually came across Grand Trunk and ENO "HOLY CRAP people camp in hammocks. DONE!!" and pretty much bought the first one I saw with mosquito netting same thing with the ENO ProFly.
I digress I like the removable doors because I will only use them occasionally. I've read a lot about how easy it is to repair cuben fiber, but that's what scares me. It seems like everyone is having to repair it. Which raises the durability red flag in my mind. I'm not a gram weenie, but something that is extremely light does seem preferable if it is durable.