Hard to pass up the blitz piece. For a LB it will always be active when he's rushing unless the DEs drop into coverage (blitz only activates on actual blitzes, not on every play as some people think). Break Block 5% is almost good enough on it's own. Assuming you have enough strength and agility to shed blocks I think I'd have to choose that over the tunnel vision, unless you are a pure speed/outside rusher, in which case TV should help a lot.