I've carried a 503 or 505 at work for many years. My job is shipping and receiving, so I have to call them into service many times a day. Despite my best efforts, I can't get the the 420HC to hold an edge for more than a day or 2. I think S30V or other premium steels (CPM154, D2, 20CV, S35VN, S110V) would make these much better for hard use. The fancy handle materials now offered in the CS are a bonus, but a better blade steel option is what I'm really hoping for.