I don’t have experience with X10, but if you are looking for in-wall dimmers, my go-to is Inovelli. They are out of stock right now, but are expected to have their Zigbee (Blue Model) 2-in-1 dimmer/switch very soon. Their pre-orders are open. I had the opportunity to do some beta testing of the switch and really love it! Another switch brand that seems to be appreciated by the community is Zooz. They have several available models and are quite responsive.
Here are a few links that might also be of use to you:
https://docs.hubitat.com/index.php?title=List_of_Compatible_Devices
