So, “do as I say, not as I do”? I just looked at Equinox and it does look a little better than flax, but flax seems to be more widely used. Both haiku and trax seem to be on the way out. All four were intended to do exactly the same thing. What a mess of an ecosystem.
Use any. I used to work with Flax, now I work with Equinox more. Choose any between Flax, Equinox, and Haiku.