I've been here for years and never owned an HDS light! In the height of my "acquisition phase" was during the period where HDS had a wait of several months. Now its on my radar except it seems no one has them in stock!
I just picked up my 4000k run light and I think that when you finally do get one you'll find it to be one of, if not the most important light in your collection.
On my way to Tucson I left almost all my lights in a couple other places, but I made sure and put an HDS in each front pocket. That and my Draco around my neck, I felt pretty well equipped. Just finished hiking down a very rocky, and at times super steep trail a few hours ago and the beam/tint of my 170N was so perfect, not to mention the low levels being great for allowing me to keep my night vision, as I did most of the descent without light, and then at times, just punching it gave me way more than enough light to determine where the trail was supposed to be going. Very rocky terrain and even going up the first part in the light was hard to determine where the trail was at times.
Tonight on the mountain, HDS was definitely my friend.