I know your post was from a long time ago, but unless your previous fins were something even floppier, like split fins, I hope you chose more training over fancy flexy fins that would only cause more work in trying to move your body and gear through the water.
If you really did need better fins[ I hope you chose some normal reasonably stiff fins that work efficiently with all types of kick strokes used in diving. There’s a reason this basic design is still prefered by experienced divers, while the fancy but not very useful "latest" designs come and go.
The opinions expressed here are mine alone and do not necessarily reflect the views of any other diver (though I suspect maybe they do).