That’s why I went with the 5300, I really did not buy the unit for a power conditioner. We get incredible light shows here, (lighting). I had never had so many new things at once, and was in a hurry for a one box solution to protect everything including the ‘back door’ for a bad surge, your coaxial cables.
If you pull up Panamax’s site you can line by line compare. If you’ve got a fix for your sat/cable feeds then I think the 5100 is a perfect buy. You really don’t need the meter, (I never look at it) and the top joule # is the same for the 5100 and the 5300. The joule rating is a little higher on the 5500 unit.
I am prob. going to chain a brick wall or similar, (series mode protector Vs MOV protection) in front of the Panamax when I get to it. The brick wall however did not sell a ‘one box’ solution and I was in a hurry.

If it’s okay to post this, here’s a link to this very topic (conditioners) on HTF you might find interesting for the different opinions.
http://www.hometheaterforum.com/htforum/showthread.php?s=&threadid=81398