I'm very happy with the SH GX2150. I connected the radio's AIS output to an industrial Bluetooth transmitter, so I can pick it up with laptops and tablets anywhere on the boat. (GPS coordinates go out through a second Bluetooth channel.) I routinely keep a Netbook mounted at the binnacle for monitoring AIS on my busy river. You can search the keyword GX2150 for posts by me on the topic. Here's one
that gives a lot of detail.
I don't need full networking, so the NMEA 0183 works perfectly fine with old fashioned serial connections. YMMV.
I also recommend their RAM3 cockpit mic, which gives full control of the radio from the location where you need it most. You don't want to have to go down into the cabin if there's an emergency need.