Why the Unit and not the Growler 40? They are identically priced, but the Growler comes with front suspension, has a 64 HTA instead of 68, and has better tires - stock 29x2.6 Vigilantes.
As the internet's #1 proponent of ultra-slack hardtails, I am surprised the Growler doesn't top your list based on the 4* improvement in HTA alone. Aluminum vs steel that important? Ability to put 29x2.8" tires in the back (although I don't know if this is proven) the dealbreaker?