aftermarket Navi and Sync
#2
I did, no need for Sync if you get a good product. Check out my thread I just created. I hated Sync the voice control never worked and my phone would never stay connected.
#3
You don't have to lose it. Theres a kit that will retain sync functionality. http://www.crutchfield.com/p_541MSFR...e.html?tp=3486