Spacecraft films DVD - need apollo recomendation

I have the Spacecraft films DVDs: Gemini, Saturn I/Ib, Apollo 8, and
Apollo 11. I'm planning to get Mercury, Liftoff, and Saturn V. I
also want to get one of the long Apollo missions, and that will be
about all I can afford to spend on these. I didn't even get to see
all of the TV of the later missions.

So I'm asking for a recommendation of which one is the best to get:
Apollo 15, 16, or 17.
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