BK-2 for production blades for me, at least so far. Love the heft, balance, handle ergos. Had an ESEE 6 for a little bit, as much as I wanted to love it, I wasn't all that into it. Flat handles weren't very comfy for extended work. I think it'd be great if they worked some contours into the handle ergos, but as it was, it didn't work for me.