FYI, replacement drivers are $46USD each, so at this point in time I believe that I will take the two step approach:

1) Replace the 3 drivers in the VP150
2) Use the feature on the HK 7200 which limits the volume.

Only question is, how do I know what to set the upper limit at? Is there some physical way to know just by listening? Or would I need an oscope?

BTW, I did not have the receiver set to "Loud", it was on "Soft"