Hi Steve,
I assume you just want to monitor/receive AIS and not transmit. For transmission you will need a separate AIS unit, integrated transponders don't exist. Transmitting can get quite complicated.
For receiving only, that daisy units looks very cool, bit of stuffing around to get it going I expect.
I have a Simrad RS35 VHF/AIS radio and it works well connected to a chart plotter. The integration doesn't seem to affect the quality of the radio, but it does however need a seperate GPS signal ( I use my chart plotter's GPS). The VHF screen is very small and would be a pain to use by itself without a plotter. It's easy to make a mistake setting up warning zones because it is so small. I don't think the integrated options are worth it unless you have a chart plotter because of the screen limitations.
Just noticed there are some fully integrated AIS/VHF/
GPS units around now. Some things to check are whether they have a NMEA or 0183 or NMEA 2000 output and if they need separate antennas. I recall one of the Standard Horizon units needed a separate Antennas for the GPS, AIS and VHF or something equally annoying.
If I was getting a new one for offshore work, I would be looking at the new B&G V60 for $669. Just connect the power, one antenna (I am pretty sure only one is antenna needed), enter your MSSI number and away you go.
www.chsmith.com.au/Products/BandG-V60-DSC-VHF-AIS-Radio.html