hunge,
For that kind of money I'd be looking at a furuno fcv 620 sounder (around $1200)and a stand alone plotter.....Might cost you $1800-$2000 for both ,but better with the two units.
I have a Garmin 178c colour combo ($740 from usa)which is being sent away under warranty for the sounder,but it means I also lose my plotter for the duration also.
I am also finding it a bit of a pain to be flicking from split screen sounder to half sounder ,half plotter and back again continually when I am sounding on contour lines for drop offs and fish schools.
I will soon buy a furuno sounder and use the garmin mainly as a plotter(when I get it back.).
Something for you to think about anyway.
Scott