Power amps into surge protector/Conditioner or DIRECT to wall? Final verdict?

I am a bit confused as how to compare devices for their surge protection. 

The Furman PST-8, using series mode surge protection, rates their product at 135VAC for the "over voltage shutoff."

Shunyata, using a hydraulic electromagnetic breaker, rates their Venom
Amp-1 for 40,000A @ 8/50 microseconds for the "transient protection."

The two companies rate their products using different units of measurement. It's like comparing apples to oranges. Which of these devices provides better protection for surge protection? It seems like there should be a standard for reporting so the general public can compare.

To add to the confusion, PS Audio rates their DirectStream Power Plant 12 (a power regenerator) using 3 sets of units; (1) an "over voltage limit" of continuous 5% of setting along with (2) a "peak surge current" of 90,000A and finally (3) a "maximum surge voltage" of 6,000V with a clamp level 340V.

How do I reconcile this to pick the best protection for my stereo? Thanks so much for any insight you can provide.

Bruce

@erik_squires  Thanks for your feedback Erik and all the clear & concise input you have contributed to this topic in the various threads over the last week. It has been helpful and very much appreciated.

@blindjim  Thanks for your empathy and encouragement in this confusing topic.