Frank, welcome aboard and congratulations on your new purchase! You're gonna love it! To answer a few of your questions:
1. I don't have a navigation system so can't answer that one.
2. I went to Autospa on Golansky Blvd. You can google it. They do window tint and can also do Ventureshield installation. There are other places but I had mine done there just over a year ago.
Lastly, stop by and meet some other 370Z owners for coffee on Saturday morning in Fairfax at the Starbucks next to Kohls.
NOVA: Zs & Coffee - Starbucks every Saturday @ 10AM
Good luck and hopefully we'll see you on a Saturday morning!