I have the Humminbird 586C and really like the unit a lot. They go for about $350, or a little less on sale and have a lot of good features for the money. I like the big 5 inch screen and the 2,4,6 or 8X zoom feature. Also the dual beam makes it easier to figure out exactly where the fish are under your boat when using the fish ID setting. It also has up to 640 pixels resolution that shows structure details better than low resolution units
good luck and lots of bites
Ham Radio, the original wireless communications
Light travels faster than sound. This is why some people appear bright until you hear them speak!