My S30V Blur came after years of carrying a by then very beat up 400A steel red Blur. Sadly, I had by then discovered framelocks - and their greater security was to be appreciated. The S30V Blur has never been as razor sharp as the base steel Blur, but it keeps it's utility-sharp edge quite well. I think 400A dulls going across one sheet of printer paper! S30V is my favorite all around blade steel, although some tool steels, like A2, D2, & M4 are better, in some regards, S30V is just a great knife blade choice.
My favorite Kershaw - long ago replacing the Blur - is the JYDII - and specifically, the SG-2/Ti framelock , which I found a NIB version at a store nearing two years ago - after it was canned - followed by a 'blem' from an advertiser here. The CB version - a linerlock with a heftier liner than the Blur - is, like other JYDII's, flipper deployed instead of spring powered a la the Blur. It's composite blade edge is CPM D2 - a great blade material. It - the CB variant - sells for less than an S30V Blur, which is harder to find, too (The JYDII in CB is a catalog item.). Good luck!
Stainz