I cant say side imaging has helped me catch more or bigger fish, but it has helped me find bait fish quickly and some nice places to fish. Someone told me one time, buy as big and nice a unit as you can, because its cheaper to do it the first time. Keep your eyes on the “unofficial humminbird forums” website. With the new models coming out, you should be able to pick up some deals on the other units, which work great. I dont know where to find the HDS units on a deal since they are so new. But either one works nicely.Britt