As many have stated already, the more rods you own the more likely you will end up using one for a specific situation depending on the body of water you're fishing, the size of the fly you're presenting or type of fly line. Years ago I bought a Scott 8' 8" 8 weight. It's pretty sweet for throwing streamers on sinking lines from a drift boat. If I were wading I might opt for my Sage 10' 6 weight. For floating lines, my Sage 9' 10 weight. And believe it or not, I have used a Sage 8' 9" 3 weight and a floating line with a 9" streamer. But your casting will be more like a single haul chuck and duck type cast and 'rolling' the streamer on the surface waiting for an explosion.