Good advice on checking travelocity
There are lots of outfitters that provide guide and equipment services in that region. Check some of their websites and see if you can trade emails with them for a recommendation.
The gps units of different brands all use the same constellation of satellites for determining where your device is. What you want to make sure is that you find the company with the best maps of that region for the application you need. I have a garmin nuvi 370 and think it is great but, I have not used it to navigate in wilderness or remote areas (I am still a compass and map kinda guy)
Have you tried google maps mobile?
If you ave a GPS transponder in the phone, it's even better.
Nice Little App for the iPhone
FYI: If you have an iPhone, there's a nice little 99 cent app called "iMapsPro Buenos Aires." It's just a plain map of Capital Federal up to about Tigre and down to about Avellanada, but the nicest feature is that you just press a little button and it shows you where you are on the map via GPS. No, it doesn't do navigation and you can't look up addresses, and it's not perfect, but hello, 99¢ if you already have an iPhone.
Dude! You have me curious!
I really like your post about the Nuvi Map at 200 pesos. I bought my chip 3 years ago and it was the only real working Garmin chip for Argentina. Although it was very expensive, I was able to sublet it to El Jeffe so as to minimize the pain. I use the Garmin to travel out of BA to the northern provinces on my bi-annual fishing / fucking trips. In reality, it's the getting in and out of BA that motivated my purchase. For what ever it's worth, the Garmin has performed exceptionally well within the Capital and surrounding province as well as throughout Argentina. Very good indeed. My only question relating to the Nuvi / cheap chip GPS unit is have you used it as a navigational tool while driving in argentina, especially BA proper. I kinda of find it hard to believe that the price of the Garmin chip would still be really high if a 200 pesos competitor existed. Your comments will be appreciated on the performance of you're NUVI with the 200 pesos chip.
Happy Mongering All.
Toymann