I would have to agree with Larry, the PCS Smartswitch is a great switch. I have a Pronto that I use to dim the lights in my den (theater room) to off and dim my floods in the kitchen to about 30% power.
With the Smartswitch Scene capability, I have a macro on my Pronto that does the above dimming but it only sends one X-10 address so I don't have to keep holding the Pronto at the 543 while it enters multiple X10 addresses and commands.
Plus with the PCS Smartswitch, you can turn the lights on to a specific brightness without having to go to full brightness than down to the desired dim level like some of the cheap switches.
My first X-10 compatible switch was a Leviton model but it didn't have a true rocker switch and didn't have scene capabilities and since then I have removed it (my wife couldn't stand it!) and have replaced it and 2 other conventional switches with PCS switches.
As Larry pointed out, they're not cheap but you know the saying, "you get what you pay for".
