Expert input on Surge Protectors

[kenandterry]

Please review the following:

The first two units are from the same manufacturer, but significant price differences (both show retail). Is one of them just overkill?

SSP-50

EMS-PT50C

This next one is quite popular, and sold at Camping World and several other RV stores.

50 Amp Portable RV Surge Guard - 34750

Given the purpose is to protect your RV, and not just driven by cost, which unit (or is there yet another) would you suggest.

[tmmar]

Can't comment on the others, but I have the EMS-PT50C and have been pleased with it. It picked up a couple of problems (low voltage at one campsite and a low frequency condition at another site- Disney's Fort Wilderness). Don't recall what I paid or where I got it, but if you search the internet, you can find it for much less than the $430 that progressive's site has it listed for. After a quick look I found this surge supressor at tweety's for $350. You may be able to find it for even less if you spend some time looking.
Good luck.