I got an opinion from Kosmo on this a whle back, but thought I would see if anyone else runs these set ups and what they would prefer. If you run a SI/DI unit and a DI unit which would you prefer? here is my scenario, I have a 898 on the console and will be loking for a second unit on the bow. I am thinking either a 788DI or a 798. Does the DI unit really have that much better of a picture with the dedicated crystals? or would you prefer a second SI unit up front?