Testing hoops with a vendor is about all I can say.
I can say after riding carbon wheels (Easton Havens and now these) I'm sold on the ride quality of carbon rims.
These rims tick all the boxes right now: Light Bicycle clicky clicky
Doing a hookless version of these rims on King hubs for my Tallboy. After riding Reynolds carbon AMs on my TB for years and recently Derbys on E29 I won't be going back to aluminum rims except for backup wheels.