Darren
I think the mount you are thinking of is a Ram mount
http://www.ram-mount.com/ramgps.htm
I have a Touratech Rallye mount for mine... what a piece of kit... love it more than the GPS V itself
As far as GPS units are concerned... I narrowed it down to the street pilot and GPS V, the pilot was just too big, the V just the right size, OK its greyscale not colour but that has proved to be better than fine!! The turn by turn auto routing function works incredibly well and I found this much more useful last week in the Pyrenees than the heading arrow on my old Magellen unit! told it to take us to the motorail terminal in Toulouse and it did just that.. no messing, other groups of bikers had spent a couple of hours lost in the city...
My only gripe with the unit is memory, it has 19 meg, which was enough to take detailed maps of the whole of the French Pyrenees, Toulouse, Lyon and most of the south coast of France (this is a hell of a lot more thanthe old units, and when I say detailed we're talkin postcodes, addresses, and even restaurants (U want French, chinese, indian or burgers sir? No kiddin you tell it it takes you!) It would have been nice if Garmin had had the foresight to equip the unit with removable data storage, instead, if I decide to embark on a serious mission I'm gonna have to take my laptop with me to upload fresh maps.
The unit does contain a basemap of the whole of Europe though which has all major roads (down to 'A' roads and even some 'b') so as long as you only need detail on a couple of cities you'll be fine
Apart from that gripe I wouldn't swap it for the world.... until of course Garmin come out with the same unit with removable data storage! And even then it'd have to be the same shape and size 'cos I ain't giviv up me Touratech mount!!! she's sooooooo sexy!
Hope this little rant helps
Paul