Good question! Something I've been thinking about recently.
I guess the question is what do we really need it to do. To me it's basically to protect the equipment from power spikes and lightning strikes.
I read this:
http://www.askthebuilder.com/235_Sur...ear_Out_.shtml
I like the idea of a whole house one.
http://www.apc.com/products/family/index.cfm?id=323
Not sure how much to spend on one though.
Part of me really just wants to get something like this though:
http://www.ecost.com/Detail.aspx?edp=38568283
And at that cost, that's not that bad.