The 16400s are great control switches. I use a bunch of them here, and there has not been one failure in 7 years. I also use them just as status indicators. One displays what the irrigation cycle will be on a daily basis in case I want to override it. Another displays the state of the automated exterior lighting, again with the ability to override if necessary. I don't think the X10 XPT has the LED display. If you want a good price on the Leviton 16400, please contact me directly.
Leviton also makes transmit only and two-way "Decora" switches, but they may be more expensive than the SmartHome equivalents. I have not had one failure of any of the Leviton DHC/X10 switches since we built here 7 years ago. One even survived a "photoflash" incandescent burnout.
Jeff