Are Shorty Headers Worth Getting

Well after looking at that Duster header post I am wondering if those shorty headers that Headman and others make would fit better and still flow OK, at least better than those factory manifolds, even the HP. Has anybody here use them and if so how did they fit and work. Even thinking of maybe just on the drivers side which is the ***** one and using the 4 and 1 header on the pass. side.