I just received my ThunderBird yesterday, and I put it up as soon as I got off work. I sold my DangerBird to a friend who loved the ACU Digital Camo (I wanted one in night grid camo), so I order another DangerBird. When the ThunderBird came out, I asked Randy to change my order. I am so glad I did.
Here is my take on it:
First, you have to sacrifice one thing for another in some cases. I had to sacrifice the triple zip for the ability to remove the netting or cover, but I feel it is worth it. I also had to sacrifice the ability to half zip the cover and half zip the netting, to get that partial cover over my upper body to keep the sun off. (I sometimes like to sleep in, and don't want the sun waking me up) However, I do like the ability to leave either the netting or cover at home if I don't need it, but you can also keep both because they clip in so they won't get lost. I love, love, love the clips for the UQ and the tie outs. Did I say I love the clips??
If I were doing a long extended hike (ie, AT Thru hike) I would take both net and cover, but it is nice to be able to lighten up my load on shorter hikes, when only one is needed.
If you are set on a DangerBird, I would recommend talking to Randy to see if he can put the clips on it, and then you would have an awesome DangerBird.
I love the DangerBird and the ThunderBird.
It is more of an individual preference as to which one will better suit your needs. Also, I love the night grid camo (just wish it came in 1.0 or 1.1). I will be hanging out in my ThunderBird this weekend.
Thank you Randy for an awesome, awesome hammock.
One more thing, if you are only 5'6, I would recommend the 10 ft ThunderBird so you can zip it up easier. I do like your idea of the biner as a so called pulley. Good luck to you in making your decision. I love the ThunderBird......