GPS shopping

I've been shopping around for a new GPS recently. We had bought one a year ago, similar to the one pictured above. A very nice LG unit. Large screen, all the bells and whistles. We had it for about two weeks before returning it. It was on sale at Sears. The problem with it was that LG was no longer updating any of the maps for that unit. I found this out as we were planning a trip to Niagara Falls. While mapping the route through Hamilton, Ontario, one particular highway was not shown. I knew the highway was less than a year old, and checking the LG website, I found out that updated maps were not going to be made for my particular model.
We used the GPS on the trip, and as we drove down the new highway, the GPS showed us offroading through hills and valleys constantly telling us to turn towards the nearest road. The next GPS we buy will be updateable and probably a large name brand like Garmin or TomTom. I'll keep you updated.