Don't forget about the new Garmin electronics. They are highly competitive right now. The spring fishing classic at Bass Pro will begin on 2-17-17. The best deal I have seen in a long time is the Garmin EchoMap 73 sv for $499.99. This dude is preloaded with maps for all of north America with 1' contour lines. It's got regular sonar, downscan imaging & side view! The model on sale does not have CHIRP technology. I'm getting one on the 17th myself. I really think Garmin owns the GPS features in fishfinders these days. You should see the detail in the western basin of Erie. It marks (and names) the Camp Perry zones and the reef complex. These units are networkable with both the EchoMap and Striker series finders. Check 'em out.