I am trying to decide what kind of chart toget for a new chart plotter. Weare getting a Simrad NSE 12 inch chartplotter. There are two options for thecharts-C-Map or Navionics Platinum. We have used Navionics but there seems tobe some preference for C-Map. Not sure which is better with the Simrad NSE especially for the canyons. Any feedback would be very helpful.