You might be better getting one of the smaller sheath knifes from CRKT.
I've tried the neck PECK and It's real light. However I found the sheath holds the knife in too hard and may be hard on fingers to take out.
I've swap that for the F4. It's great because although it's slightly heavier than the neck PECK, it holds a great edge, decently small, and you can probably utilize the clip to clip it to pockets inside your purse. I found the flat grind better than chisel grind as it's easier to sharpen yourself.
Although I never tried the KISS, I'd think they're not that good of an idea because like Ron@SOG said, if you loosen it, it might open on you.
Columbia River makes some nice knifes in good price ranges, I'd think you'll find something you'll like.