I have ended up with a Buck Sirus 297 as my EDC. I have lots of other knives to choose from, but the Sirus has just been the one I carry the most. The blade steel on my 297 is 420HC. I can sharpen it quickly and get a super sharp edge on it. Since I sharpen my knives frequently, I really don't have much of an idea how well the 420HC holds it's edge. Since I like this knife, and it's discontinued, I'm thinking I ought to buy a spare while they are available in the secondary market. My question is, should I get a 298 Sirus, which uses 154CM as it's blade steel, or get the less expensive 297 with 420HC? THe price difference is about $25. Will 154CM give me a lot more in edge holding ability? I don't know if there was a big difference in the heat treat that Buck put on either knife.