After trying the high-end GPS (tomtom 1005, 3590 and 3597 garmin, mappy 546) that convinced me, I turned to the GPS input and midrange. My choice fell on the gps tomtom xl classic good reviews from buyers. This gps, certainly devoid of any wacky options (bloutooth, voice control ...) is perfect for me by the fluidity of its screen, ease of programming and customization of settings.
Positives: Speed limit display, radar warning beep with a dice you get to the area, pleasant voice speak street, very fast input with pull-down menu, Life card after registration, update on easy Internet
The downside: no traffic information but it does not matter considering the price and all the benefits.