I was just checking the maps available on tomtom website and noticed that the size for North America maps 7.10 is different for 720 and 920. 720 maps are 1.7g and 920 are 2gb. 910 users get the same map that 920 users get so if you were debating between 910 and 720, here is another plus for 910.
I had used a 510 and was totally disappointed by the lack of pois till I used a friend's 910, absolutely no comparison. I travel a lot and its just nice to put in the name of a place without googling it first. Seems like they have taken short cuts on 720 maps also compared to 920 due to lack of enough internal memory.
http://www.tomtom.com/products/maps/select.php?D=61&Language=1&P=379#. Make sure your location is set to UK.
I had used a 510 and was totally disappointed by the lack of pois till I used a friend's 910, absolutely no comparison. I travel a lot and its just nice to put in the name of a place without googling it first. Seems like they have taken short cuts on 720 maps also compared to 920 due to lack of enough internal memory.
http://www.tomtom.com/products/maps/select.php?D=61&Language=1&P=379#. Make sure your location is set to UK.