I just have "The Great Eight" from the 1975-76 Reds.
I have felt no need to go any further with it. Never felt compelled to collect Pitchers' Bats, or guys like Bill Plummer and Merv Rettenmund. Nothing at all against them... just not as meaningful, or on the same plane as the starters.
It all comes down to personal preference, I guess. Plus I had plenty of other ways to part with money at the time.