What is a good GPS navigation application for the iPhone 4?

I am currently using "Waze" GPS app on my iPhone, and it sucks. It alway give routes that are like detour routes, and when it comes time to switch to intersections on the freeway, it always seem to delay and tell you which intersection to take at the very last second. This is so dangerous, and I am looking at the dam GPS and wondering, should I go 10 E or 10 W? I dont mind paying for a good app, but I dont want to go overboard on spending. Probably, no more than $9.99.