I hadn't checked back in on this thread in awhile. I ended up downloading the MapFactor Navigator since it was free. I'll give it a try and if I don't like it, I'll try Sygic next, as that seems to have really good reviews.
Thank you!! That's exactly what I have been looking for. I ended up buying a Ram Aqua Box for my S3 because I couldn't find any motorcycle mounted waterproof cases specifically made for the GS3. The Ram box seems like a good case, but it's really big, since it's a universal case. I'll probably hold off on buying this case, pending on how the Aqua box works out for me, but I'll keep the page bookmarked.