I am looking at getting an inexpensive, yet functional chartplotter as well as depth finder. I've used a Garmin Echo 150 the past two seasons for depth & water temp, but need the chart plotting capability. Inexpensive is kinda critical here. I'd love to hear from people who have experience with the Lowrance Elite-4x DSI, or any of the Elite-4 series. . Also what about Lake Insight, Navionics or any other compatible chips? How are the preloaded charts? Do you need the additional chips? I will be sailing Lake Michigan from Milwaukee north this summer. Alone. Thanks for the info. Jennifer