Originally Posted by backin15
Not familiar with the Worldnav but I have a Garmin 1450LMT and love it! The LM stands for lifetime map updates so in theory it will never be obsolete.
I have a garmin 885. This model can be operated through voice commands. It works well but I did not get lifetime map updates included which makes this piece obsolete in a couple years
(without spending as much money as a new one for a map update...). Consumer reports consistently rates garmin's as the best but make sure you get one with the free map updates.