The answer to your basic inquiry is no to part one and yes to part two.
The 2610 has a 128meg compact flash (CF) card that will accept the highly detailed data from the City Navigator (CN) CD rom and it will accept a lot of data...in my first trial almost all of Minnesota, Wisconsin and the Chicago metro area.
It also is excellent at combining basemap data with CN data so you could, for example...load the Minneapolis metro area and the Chicago metro area and have a seamless route created for you that is a combination of basemap and CN maps for long trip.
Further, you can upgrade the CF card so you can add more CN map detail, all the way up to 2 GB, though those cards are very expensive. The total space for all of the CN maps is just under 2 GB. For my use around Minnesota and the occasional long trips the 128 seems far more than adequate.
Lastly, I got my unit from www.safetracgps.com
and the were great to deal with. They may be out of stock right now, but they give you the option of backing out if they are. Hope this helps.