I don't thing a "a better model of SmartMeter, one that doesn't mess up Home Automation systems" will ever be made. BGE in Baltimore has an "opt out" for those of us who don't want to have to put out $$$ to keep our X10 working properly or for other reasons. I've already put my name in the "no smart meter" list.
From what I've read, the Landis+Gyr Focus AXR meter that Pepco (boo!) is supposed to be installing on Monday doesn't communicate over the powerline at all. It uses a wireless transmission network that is completely independent of the power lines.
Since last weekend's storm, Pepco had a really hard time keeping track of which customers were still without power. As they restored power to a large feeder, their system assumed that ALL customers served by that feeder were restored, and those who still did not have power had to call again to report their outage. It happened to us AT LEAST 3 times in the 104 hours we were without power. If having a SmartMeter will help the utility know when my power goes out, and let them know when they REALLY have restored it, I'm all for it.
Even if YOU don't get a SmartMeter on your house, if BGE installs them for your neighbors, and if they decide to use powerline communications for those, it STILL could mess up your X10 system.