Just purchased the 510 and did extensive research first. It should be what you need. AS you said the 810 has navigation which i can only see being handy if you ride your bike overseas or somewhere in another state.
Just purchased the 510 and did extensive research first. It should be what you need. AS you said the 810 has navigation which i can only see being handy if you ride your bike overseas or somewhere in another state.
Nevermind. I just found this thread. http://forum.slowtwitch.com/gforum.cgi?post=5281639