X10 does support status. But many of the cheaper modules do not support it. We mainly use modules from Xanura when doing installs and almost all of these support status.
Energy savers will cause you problems.
A whole house filter such as an FD10 would be a good idea.
You can buy plug in X10 filters for specific items. You can also get inline filters if you need to hard wire a filter into a circuit such as lighting.
The XTB from Jeff.
http://jeffvolp.home.att.net/xtb_files.htm is halos another possibility if you have problems. I have heard good things about this device, though haven't used one myself.