I suspect the problem would be over or under voltage (brownouts), which would be corrected by a stabilizer, but I suspect the cost to protect a whole house could be prohibitive, and unecessary.
I would look at what someone like APC has to offer (
http://apc.com/products/category.cfm?id=12&lid=12) for individual components. They have everything form simple, stepped regulators, to fully conditioned, sine wave output UPS systems.
For larger solutions, someone like IREM
http://www.irem.it/en/AVR/AVRset.htm might be an option, although I know nothing about this company.