Having a 38' sport fisherman built and trying to decide on a fish finder. Have a Raymarine 760 on my current boat and it isn't too useful.<br />Fishing in 300 - 2000 feet of water for tuna, wahoo, etc., not bottom fishing.<br /><br />Another Raymarine, the new digital unit ? Interphase Twinscope ?<br /><br />Anybody have any recommendations ?<br /><br />Chart plotter could be seperate ot integrated.