That "Race to the Moon" back then had some saddening sacrifices coming with it. When I was little, I found the achievement of having people on the moon really one of the greatest achievements ever (Don't get me wrong, I still think this way).
However, recently I found on the Internet, that almost all US Lunar Probe programs were scheduled to be followed by more advanced probes. For instance, the Ranger Block III would have been followed by a Block IV (I think this was like the original Block III would have been, with the cameras and additional experiments), and a Block V, which would have repeated the capsule experiment from Block II on a Block IV probe.
Also, the Lunar Orbiter would had have a Block II version, carrying IR and gamma spectrometers. And finally, there were plans for a Surveyor Block II, even carrying a Sojourner style rover.
All these were not done, most probably because the money lacked, because that was needed to get the manned systems ready.
If you just want to put, say, the ALSEP packages on the moon, a Surveyor Block II or even Block III could have done that too.
It is also interesting, that the USSR did pause the landing program after Luna 9 to send a Lunar Orbiter in the shape of Luna 10 ASAP. The next landing then wasn't until Luna 13 as we know. Bernd Leitenberger's opinion is, that from Luna 15 on (in the "second-generation" Luna program), the probes were not designed as "speed shots", but rather to do some ingenious lunar research.
He also presented an interesting answer to the question, why STS/ISS are not that present in the public and why it is so hard to get proper funding for them. He formulated answers from all five US manned space programs to the question: "Why do we send men into space?"
Here are they:
For Mercury: Because we want to send a man into space before the Russians do it.
For Gemini: Because we want to beat the Russians to the moon and because we need it as a stepping-stone for Apollo.
For Apollo: Because we want to land a American on the moon before the Russians do this.
For Shuttle: Because we want to make Orbital Transport cheaper.
For ISS: Because we want to make Zero-G research.
He said that the first three answers touch people emotionally, while the last two are more matter-of-fact answers, which do not get the public's attention as much as the first three.