Buying one of these TODAY! Bought a new car and I need navi...no I can't wait. I see a lot of reviews of the f90bt vs the 8120, but what about the 5120? It has comparable screen size and is about the same price. Since I want the bluetooth and ipod functionality, I can get these units for basically the same price when you add the cost of the accessories on to the Kenwood. Meanwhile, the f90bt *SHOULD* be the better unit with it's list of features. However, the bugs might kill the deal for me. They may or may not EVER be fixed and that's what scares me. Can anyone with HANDS ON experienc