Dave R, I agree with you completely on the K-31.
I would say that most all Mil-Surps have soul. Thats one reason why I have grown to love them so. Everytime I shoot one, I think about the guy that had to carry it in boot camp, or the guy that used it in combat, or that guy that died holding it. I think about where the rifle has been, and what stories it could tell me. I feel that way about all my mil-surps, but my K31 in particular does that to me, because now I have a name to go with the rifle.
Outside of that, I think soul in a rifle is hard to define, but easy to spot. I see it everytime I see an old, original colt SAA, everytime I see a Civil War rifle, or anytime I see a rifle that someone really loves, even if it is by all possible definition a POS. As far as soul in a design goes, my vote goes for the Winchester 94. Its only my choice, but every time I see one, even the fairly horrible new ones, I just can sort of feel something.