if you or someone else did the bypass then you can view navi/dvds while driving with the 50 or 60 software.
If you go with the 60 software the look is a little different than the 50 software + updated maps that's it.
all you do is pop in the 60 software and it's all automatic.
I'm also running an N2 head unit with an N1 brain + west N3 software. I'll be running my 50 software until I see new links for the east coast.
Good luck
btw I downloaded the east coast again last night... and guess what... alcohol still can't read it... I did the same steps as the west coast and