Just as a quick answer the stam is the better value. With every bit of damage coming in that 250 life is a permanent buffer between you and death. The block value *can* take 42 damage out of one attack and provide you with a bit more threat but it doesn't do well to try and compare a non-static value against a static value. There is also the fact that stam will receive a very nice boost from Kings and such. I know I'm plugging the EH agenda but I really don't find a point in comparing stats that give such different results. Personal opinion would put me down for 80stam/1sbv, overbalanced I know, but thats what I'd place my priorities on for gearing.