I would put Garmin ahead on robustness. Tom Tom is the market leader but then they aggressively advertise more than the others.
After much research I settled on a Nuvi 760 for our trip in July this year and it worked extremely well. A mate's also bought one and is currently touring the UK with it (got the UK maps as well as the Aus ones), so I'm keen to learn how he got on when he gets back.
MY15 Discovery 4 SE SDV6
Past: 97 D1 Tdi, 03 D2a Td5, 08 Kimberley Kamper, 08 Defender 110 TDCi, 99 Defender 110 300Tdi[/SIZE]
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