I'm looking for a folding knife, but I'm very particular. I want a lockback spear point with a thin blade that's no less than 4" and no more than 5.5". No plastic in the handle, and hopefully it'll cost less than $80, but I'm flexible. If not a lockback, I might accept the right slipjoint. Can anyone recommend a knife that fits those specs, or is at least close to them? Thanks in advance!