Posted By:
Bob SHi, Folks
I just want to thank everyone for their well thought out and highly informed opininions on my question(s).
I expected no less from the best group of vintage card collectors on the planet. 
If I am accurately summarizing everybody's posts, I would say it depends on each persons' intended subsequent use(s) for their cards that determines their answer to the main question..."to slab or not"... and similarly, personal preference, if one decides to slab, as to whom to get to do the slabbing, depending on their particular reason(s) for them being in the hobby. (Collector, reseller, archivist, exhibitor, etc.)
How's that for a run on sentence?....LOL
Again, thanks, and everybody have a fine weekend.
Bob S