I am looking at adding a gps/plotter & radar to my Hunter 420.I now have ST60 instruments, ST7000 autopilot, and Raynav 300 GPS which interfaces with my laptop and Cap'n software for plotting at nav station.I am considering adding a C80 or C120 (+$680) at the helm and a 2 or 4kw (+$600)raynav radar.* Is the C120 worth extra money or just overkill?* Is the 4kw worth extra money or just overkill?While I'm sure the big screen and additional power on radar are nice, the whole package changes from 5k to 6.3k with install, navpod, etc. Are there any 'real' advantages to the upgrades? I understand that the 4kw radar will allow better weather tracking and more clearly indicate nearby objects.Any comments welcome...thanks