I did the same research and chose the 850. I am very happy with it. It is quiet enough, it does not require batteries (which are very annoying and potentially expensive), and is comfortable enough for a 3 hour flight. Plus it is small and case and all does not take up very much room in my flight kit. I do not regret my choice at all.

Note: If you are going to be flying an ERJ, get something much quieter.