I just bought a bk2 and bk9 and I love these knives!
I thought the handles were slippery so I used camoform wrap to have more grip and some shock absorption. (great stuff!!) I also decided that the bk13 that came wit the bk9 was great to use with a firesteel so I made a separate kydex sheath for it to attach to my bk2 sheath. (I wish the new bk9 had the old sheath)