Good info, Darin.
I would say HD glass gets really beneficial in snowy conditions, especially glassing burns in the winter. If someone spends a lot of time glassing in snowy conditions, I would recommend the HD/ED/FL CA-controlling glass.
I spoke with a Tech guy at Swarovski and he told me he personally didn't think the human eye could see the difference between Non HD and HD glass. He said it shows up the most with taking photos through the specific HD optics. I have HD optics and I can't say they are any better than the Non HD I have used in the past.
You might be surprised when you get that HD spotter that the reduced CA will be useful for general glassing. High contrast viewing seems to come up often in the high country for me.