If you're not committed to it, I would go with all ADA soil or all Fluval soil. I'd skip the ecocomplete. It offers essentially nothing.
I can get the Fluval soil cheaper and it has the same look. However if there is a big diference between the two I'm not completely sold on Fluval. I use the Eco complete underneath the soil just trying to mimic ADA's power sand. In the last video of Amano's Unzan stone build I watched he just used all soil. Is this the latest style?
Thanks for the feedback