I got my performance blue 2013 Titanium without the NAV for about 22k after my xplan discount.
My logic is that I have an Iphone that has real time up to date traffic information. I also prefer using Waze because it tells me where the cops are and saves me from having to buy an expensive radar detector.
I did test drive a Titanium with the NAV and it didn't seem as cool as my Iphone is. Also if you don't get the NAV package you can still get turn by turn direction using Sync Services. I find that it works pretty decent if you stick to it's actual route and don't make any deviation (like for traffic).