David

Hi Arthur , I do use Sonarworks on my speakers and the mixes translate very well to other systems, 

I do not use Sonarworks for my headphones , Morphit is much closer to my speaker eq.

I use Shure SRH840 headphones. I would expect Sonarworks to be closer but they are not.  

These Headphones are not calibrated buy Sonarworks.  That maybe an option for you is to buy 

a calibrated set from them.   In the mean time I would do a mix using Morphit and a mix using Sonarworks

and see which mix translates better to other systems ,   That is what counts , 

very nice , great playing and production!