I got a Lowrance elite 4x fish finder for christmas (along with 4 $25 gift cards to bass pro on top of the one i already had), but I was looking on youtube at the 4x dsi and it looked pretty sweet and I was thinking about taking mine back and getting the dsi. Does anyone know anything about the down scanning imaging? Would it be worth the extra $40-$50 (in gift cards) i would be spending on it? Any advice would be greatly appreciated!