get a nokia n73 download tomtom 6 mobile and use ure phoen cradle nobody breaks windscreens for phone cradles, the tomt tom is much much better faster and more accurate, it has a cold start time using any bluetooth gps of around 20 secs compared to the 5 mins ure tom tom takes.
also the screen is big and its so much easiet to update with cameras voices etc, plus its on ure mobile, dont need to worry about smudge marks on screen and keeping safe the big tom tom kit when u just get it on ure mobile.
Teh sound and speaker is mint and one big big plus is the battery life it lasts for about 3 times more than a standard tom tom so u have no wires anyway. i used it fo r9 hrs staright york to london and back yesterday only lost two bars was mint picked all cameras everythign also locks onto tom tom traffic nicely using ure phone gps cant complain man if u want tom tom mobile 6 let me know.