Tyre and TomTom are an excellent duo. On the latest Tom Tom Rider 5, Tyre is integrated. Biggest plus: it also enables the Tom Tom Rider to make tracklogs, something which was not possible in the Tom Tom Urban Rider.
The Rider 5 comes also with unlimited free map updates.
On the older tomtom rider (or even the TomTom Go and One) you can convert ANY Garmin based *.gdb route without the lost of route points by using a device from the Dutch Transalpclub called 'Hermanizer':
In my modest opinion, the best SatNav you can get on a motorcycle. I love the 'Plan Winding Route' option. Its BRILLIANT!