Which topo benelux version? There are several. I have a topomap Benelux V1. On the garmin site is a version V2, it's a routable version but the maps are 1:50.000.

The Onroute maps are based on the Dutch kadaster 1:10.000 maps. So they are much better for The Netherlands. Benelux V2 is nice for belgium and Luxemnourg But I think I prefer them separate as well in a lower scale.
The Onroute maps 1.12 and 1.13 light are still the latest onroute versions available on their site.

I wold like to have the instalable ISO's of these Onroute maps. But somehow they are not available.