Hi,
Zumo 550 a good recommendation, but watch out as Garmin are restricting the license for City Navigator v9 now (no one seems to know why exactly)
More info here:
No more new unlock codes for City Navigator Europe v9 Available!
However, you might need to check with Garmin as if you are an existing customer (i.e. with a US or Canada version of MapSource) they might have a solution for you.
Suggest you might want to contact Garmin before shelling out cash though.
HTH,
David