I feel like Manny is a shoo-in for the Gold Glove, which - unlike Jones - he actually deserves. The last player I remember dominating a game defensively from 3B like he does was Graig Nettles. Brooks was just a few years before my time, but of course he set the standard that Manny is approaching. His arm is just astonishing, though you're right UH that he only uses enough of it to get the runner at first. When he cuts one loose, it is amazing.
And I love the way he turns the double play. He puts it right on the pivot man's right breast every time, so that the guy catches it in a throwing position. He already makes that throw better and more consistently in the perfect spot than just about anyone I've ever seen.