Hi, I purchased 2 Garmin Nuvi 760 last July (Costco) anyway I want to update the maps because they seem to be no good while I travel in FL (new highways in Tampa). I have found a few sites that offer free maps to load into the Garmin but am fearful to use them, I paid over $800 for the units and was surprised to see that they want another $120 each to upgrade the maps. Any advice on maps to load the system with. I was hoping if I got the lifetime upgrade I could do them both but no. Thanks for the info in advance!