One way to enhance the quality of the vertical stat is to estimate how much of the vertical was powder. The sum of total vertical and powder vertical is a pretty good quality of ski experience indicator.
Highest day this season with powder was April 9 at Mammoth, 29,900 total of which 13K was powder. Later I ran across a Mammoth Forum about a charity vertical challenge that was held the same day. The winning fund-raiser skied 82K by yoyoing Chair 3, which rises 900 vert in 4 minutes. One of the entrants couldn't pass up the new snow and wandered farther afield but still wound up with 52K for the day.
I am still impressed with both of the above and unlikely capable of either. My "career" powder day (35K, 18K of powder) in terms of quality was also on April 9 at Mammoth in 1999: http://www.skisocal.org/cgi/ski.pl/detail/144;98-99