Recommend a decent Sat Nav?

[bwizz]

I  use a very cheepo navigo 3.5 I have fitted TT 7.9 europe  I bought a standard motor bike mount clamp and a home made charger ,Walkman headpones for sound.This is permanently connected to the battery and a loose lead, cable tied around the steering head. Used this set up quite a lot over the last 3 years , Overhead sun can be a problem ,but apart from that great !