As far as which brand - I have the TomTom and it does OK. Really wish I had the room for my laptop, if you really want a great GPS checkout the Delorme Earthmate GPS. I got the Laptop GPS and connected to my laptop for $50. Really nice feature is voice command - tell it to zoom in or out, pan left, right, up, down and soooo much more. I used to travel all over 7 states and it was a time saver. Loved the large laptop screen and the zoom level stayed at what ever level you wanted. Great route planning and printouts. Shows speed and altitude. Way too many great features to list here.
06 Commander Limited Hemi - QDII,
Past -89 Comanche, 98 Grand Cherokee (2WD), 2000 Cherokee, 05 Grand Cherokee Limited 4.7
Had to replace the brakes - they opened more gas stations in town