2610 V9 CN
There wont be a great deal difference - some new roundabouts and by- passes but V9 is 2-3 years later that V7.
Note! The Mapsource updates have now stopped for 2610 versions at the 2009 version as the new NT Map Source is now used on Zumo, Nuvi and 2820/ Bmw Nav III units.
You cannot update your 2610 with the later NT maps.
I ran a 2610 for several years and it was excellent. Now use a 2820 and Bmw Nav III with NT City Navigator Europe NT 2010.
You may wish to use a larger memory card - up to 2GB and possible more is ok and takes most of the Map Source maps you download fron the computer.
Safe riding,
Mike