RE: 10x or 9z???
Never owned one, after playing with a couple at the field, and trying to help the owner try to figure it out I vowed to never buy one. Its just not a radio for me, my 10x is easy to figure out, that thing for me was much harder. My 10x does everything and more than I need so I am happy. Everyones needs differ, so if you think its better buy it.
I just adjust the travel of that servo, never had an issue of not being able to get the needed throw out of a servo yet.