As to the value of those little surge protected outlets, I consider them to be slightly above useless. The protection level values on anything small like that means it will basically protect from a surge caused by something INSIDE your facility, but not from the typical stuff that comes in from the utility side. They are basically relying on the impedance of the circuit to their install point to help out, a LOT. But probably the biggest detractor to all of those small cheap devices it that even if they work, they work ONCE, sacrificing themselves in the effort. Without an indicator showing you that they are dead, you go on merrily thinking you are protected, and you are not.
I prefer SPDs mounted at the service or the panel mains (or both) that have indicators that tell you when it's time to change them. Even then, the ones that are just little LEDs only work if someone looks for it and sees that it's indicating failure. I've used some that have a contact that closes so you can tie in into a BMS system to notify the maintenance people that it needs to be replaced.
Many people are shocked when they discover I am not a good electrician...
They know that some surge may still make it past their device, but their device will have knocked it down significantly, so to speak.
Check with SURGE SUPPRESSION INC. (SSI), 888-987-TVSS. [SURGESUPPRESSION.COM]. They have good literature. I have been to their seminars and watched the tests and results. Impressive.
I have them on my property and they do work. Spec them in all my projects.
It's my name going on that drawing, not yours. If what you want ain't right, it ain't going on the drawings!
I know of at least a couple old churches where they will tell you the current building is the third one they have had and that the previous buildings burned down. But those all were in the days of wood or coal burning heating and I'm sure was a factor in causing the fire.