Thanks for the feedback and shout-outs, folks! Much appreciated. As was likely obvious, I didn't want to write a short reference guide to pumps since those are readily found on the InterTubes. I was actually going for the very LONG version with a dump truck's worth of details, one that even explains what NSF51 means and mentions the burst point of PEX. Many won't read my novella, but there's many factoids there for those who want that detail. I suppose I wrote it for you real and faux engineers out there.
Speaking of PEX, thanks for your details on that, StirCrazy. You're correct that there's several variations of PEX, and its reliability and capabilities including burst pressure start to get fuzzy after a decade of use, vibration and summer heat.
Glad my lengthy mosh pit o' wordage proved helpful.
