The best value is 1490, but only a series 3XXX will match with the condition of thin 10 millimeters.
With the 3XXX you gain a lot of features that...; in my opinion, are not useful. Where I live, I always use the free map because it's more complete and precise; some you should have in mind when you buy your new device, if you will really use the new features. Maybe, the best suggestion is the Schermann's...; but, the high resolution screen is to me the main reason to I bout my 3460, the dashboard customizable is other feature I really like, the same with their capacity of route or search address in the deactivated maps (this not occur with 2012 devices)! So, a 2013 device must be considered! There are many details that can make a difference in day-by-day.

Best regards to all!