Things seem to have changed since the topic was previously discussed.
The Ocean Rodeo Predator seems to be the best drysuit out there for kitesurfing - merely because of the snug fitting and flexibility.
Any other suggestions based on fitting/flexibility, ability to keep you dry and strength in tear and wear?
I guess the ability to keep you warm is not a factor as it is the inner layers that matters in that respect.
Ciao, M