After much consideration I have reset my NS1000s to a height of 16", with no rake.
Doing this has brought me to realize that the "airy" sound experienced using extreme rake is artificially created by the rake.
While rake is very inviting to listen to, it's airy sound is not something that exists on the original recordings.
Rake has the effect of reducing the brightness of the high and mid ranges, this could be considered a good thing - NS1000s are known for being bright.
Rake also reduces the bass volume and tightness, this is not something the NS1000s need, if anything they lack somewhat in this area.
After 4 days - 20+ hours of listening to 6 albums typically used when setting up my system, I've made changes to both the high and mid level attenuators.
Current settings are High level at -2dB, Mid level at -2.5dB, reducing the brightness and I feel achieving a better balance across the 3 ranges.
Bass is now more equally balanced with the high and mid ranges.
This is a work in progress, I feel the effects so far are much more desirable than the fake airiness produced by rake.
It's my desire to hear the recordings as they were intended to sound, not to enhance them.