Been trying out some themes, both free and premium ones, and ended up almost where we started - with Sydney!
As opposed to the other themes it seems sturdy and so far works well with our two major plugins, Woocommerce and Learndash. (Have you any known problems with the two mentioned plugins, would be glad to know!)
Also what is difference between free ond pro version of Sydney? (For instance, integration with Fusion page builder generated shortcodes seems to be lacking in this free version. How about pro?)