Same here. I had 2 Futaba 9ZWCII radios, and it was expensive to switch over. But I did. The extra 2 proportional channels was the major deciding factor for me (the 9th channel on the 9Z was only a on/off switch). I flew them both and have many hours with each. I spent hours in the shop trying to see what things I would loose/gain by going to the 10X. I spend another big chunk of time getting deep in the programming with mixers, ganged functions on a single channel, complex mixing and setups, etc. I was looking for things that I couldn't do on the 10X that I could on the 9ZWCII. That list was very very small, and they were all unimportant. The only thing that I wish it would allow more of was switch assignment. However, it easily allowed me to reassign all the most common setups, and it didn't limit me in the least. I easily matched the setups I used on the 9Z in the 10X. I wrote a more detailed comparison that can be read on my web site at [link=http://www.giantscalerc.com]GiantScaleRC.com[/link] in the misc section, left sidebar.