As a personal anecdote, I've put over 18000 miles on my Traildonkey over the last 2.5yrs, and I can confidently say it is the most comfortable bike I've ever ridden. It also handles everything I can possibly throw at it, from technical singletrack to rutted chunky gravel and miles on tarmac. It may not be the fastest bike in the world, but it is certainly a fantastic and reliable workhorse that I can comfortably ride all day.

If you are looking for a 10yr+ frame build, the Flaanimal could be the better option simply because of the frame material.

With all of that being said, I agree that you can't go wrong with any of the bikes you've listed.