He bought the 797. We figured that 1K is enough to invest on new tech. If we like it then we'll probably buy one of the bigger models once the price goes down. We were graphing stumps and fallen trees in 45' of water. It is amazing how tech. could change fishing. My brother and I have a long way to go before we completely understand everything that this unit offers us. It's going to be a lot of fun aquiring this information though!!!!!!