Popped in to the Curry's clearance store in Merry Hill Midlands and picked one of these up, these sold for £300-£400 a few months back. As they are a more expensive item you will have to ask for one at the desk as they are kept in the cage, they were showing 7 in stock when I was there.
Big plus points about this unit are:
5" Capacitive iphone like touch screen
2 years free map updates
3D City/Landscape view
You can also optionally add a DVB Freeview module and also add a Live modem for Live services.
Excellent well built unit, best map image/refresh I have ever seen on a sat nav and the choice of 3 recommended routes is a brilliant idea, which shows you on a map each route.
Please note only available from this store!!!.