Thanks for all your replies, the Vesper sounds good but I can view my E7 chartplotter MFD (inc the AIS overlay) wirelessly on an Ipad etc so I don't need that function on an AIS tranceiver.
The Raymarine unit would be a good choice because virtually everything else is Raymarine but the Raymarine unit is twice the price, that's why I'm leaning towards the GME. I just thought at $549 for a class B tranceiver it sounded too good to be true.
Looks like a good little unit Ramona. It would just be my luck to drop it over the side

Is visiver a typo??
Thanks for your info Data wiz I guess the I don't need the wireless gateway because the E7 has its own wireless system.