Me personally would not be with out SI on the front. I fish a lot of suspended schools of Crappie the ones most people cannot find unless just happen to run over them with 2D or DI. Many times I find the biggest Crappies are not in tight schools that most people would not notice with regular 2D DI because all they see is one or 2 fish. With SI I can see how many fish are actually there all scattered out. There maybe only 5-20 fish in that loose school but every one of them will be big.