Here's some useless trivia:
In the early 90's I was looking at top of the line packs at a local mountaineering store. The two they carried were the Dana Terraplane and Gregory Denali Pro. I ended up the the Gregory at around $450. It was a great pack then, and still is now. What's interesting is the recent switch back to carbon fiber frame stays / frame sheets. My nearly 20 year old Gregory has carbon fiber stays with a plastic frame sheet. At the time they were marketed as "state of the art". Surprisingly enough, the version of the Denali Pro that followed my pack after a few years went back to aluminum stays. Two down sides to carbon fiber is you can't shape it to your individual back like aluminum and when it breaks, it's broken and tough to repair in the field. It will be interesting to see if the current crop of carbon fiber suspensions stick around this time.
