I would give up DI in a heart beat versus having SI if you have SI you will not really need DI at least for me I use 2D more then anything when on structure fishing DI does nothing for you sitting still. DI is a narrow slice so you cannot use it to fish jigs and watch how the fish react to your presentation. Try finding cribs with 2D takes for ever find cribs with SI make one pass and you know where every crib stick or brushpile in that area is, drop waypoints on each one and go fish.