Currently have a road angel navigator 6000. Looking to upgrade as it is a bit dated. What is the best sat nav out there for about £100? Have seen this one at Halfords:Halfords | Navigon 40 Essential Traffic Sat Nav UK, ROI & Europe But wondered if there are better out there for that price. Do not want to retro fit an Audi system as need to swap it between me and my missus cars. Also, updating the sytem is a pain.