I found this - might help you chosse the best fit.

http://www.howstuffworks.com/framed....rg/Surge_1.htm

[How to Choose a Surge Protector

Now that you are more aware of power problems and the various solutions, we recommend the following approach in choosing a surge protector. This approach eliminates the "technitalk" and confusion that the selection process could entail, and, hopefully, will demystify the selection ]