Be thankful that your Quest has 256Mb memory (or thereabouts).
In Australia, and I think in the US, it only comes with 128Mb and the Garmin importers don't seem to have any idea of when we will get the larger memory version. The new release of CityNavigator software won't fit into existing Quests here .... rather dopey really.
BTW, has anyone reported problems with the non-removable battery?