Im in the market for a new fish finder. I currently have a humminbird 597 hd di. Been nothing but problems since i bought it. When u get up to running speed it freezes up. Have to shut off and reboot everytime. Now all of a sudden it keeps jumping between 1ft and actual depth. 2d sonar and di show actual depth but the depth in upper left shows 1ft. Anyone know a fix to this? Besides that im in the market for a di/si unit. Lookin at possibly a humminbird 898. Anyone recommend this unit or something in the similar price range. Found a few around the $1200 price range. Thanks for the help