I personally really like 440V steel. I haven't had any problems sharpening it on my Lil Temp. If you're looking to sharpen serrations I still really like the Sharpmaker, if you don't have one already. 440V, in my experience, is a lot more resistant against corrosion that S30V, is a little easier to touch up (don't let it get too dull though), and has pretty good edge retention.