I seen one at Bass Pro last weekend. Looks pretty good for a 4" screen. I just looked them up on the Lowrance website and they have several models. Even one with GPS. I may buy a DSI model for the front of my boat to run along side my 510C. Figure I can get a mount from Hi-Tek to get it up above my rod racks to make it easier to see. Seen them for $180 for the DSI model online.