We have an AISPro 1000, which is only a receiver. We wish we had bought one that had both transmit and receive capability but we didn't. We have an amplified antenna splitter that does double duty for both the VHF and the AIS, and works very well. We did not try to wire the AIS receiver to the C-80 because we had no Navionics CF cards (2005 technology) for the C-80 for the Loop.
The AISPro 1000 is able to multiplex the GPS signal from the C-80 via the C-80's NMEA output with the AIS signal from the AIS receiver. The combined signal is then output it via a USB cable to our Windows laptop running Coastal Explorer for display. We used our iPad as the monitor for the Windows laptop wih Duet Disiplay, a nifty iPad app. The Windows laptop was set up to run with the cover closed. There is a host program that runs on the laptop and the Duet Display app runs on the iPad. The iPad was on a RAM mount above and to the left of the C-80. I installed the AIS and antenna splitter myself and it was not too difficult.
This worked great on the river system, as it allowed us to identify tows and hail them by name to inquire about their directions for passing. Also, the iPad with Duet Display also acted as a touch screen for the laptop, so it was not necessary to use a mouse or keyboard. Coastal Explorer is a WAY better nav program than the C-80 has, and it also has Active Captain data. The C-80 really only supplied the GPS data to the laptop, and displayed depth and the trip odometer.
We used Garmin Blue Chart Mobile for navigation almost everywhere else except the river system. Really, iPad navigation is the way to go. You probably already have an iPad tne nav app, including charts and chart updates, will be about $50.
Back here in the PNW, we are using the C-80 with the Vancouver Island chip, which is good down to about Everett, but we also run either Garmin Blue Chart (Patty) or Aqua Map (Pat) on the iPad. At this point, we have no thoughts of a new dedicated chartplotter. If we did anything, and that is not likely, we would go with a complete computer based system.