Apple ipod

Navigon or TomTom for the iPhone?

What is the best GPS navigation application for iPhone that provides turn voice instructions conductor? need someone to tell me in advance for which was directed to vote before leaving the case in an inter-occupied. I live in a rural area where there is constant G3 or Edge coverage for what should be an application that will work well when I'm out of range. From what I read, TomTom and Navigon as the best for what I need. What is better?

TomTom application and appropriate, the maps are downloaded to your iPhone if you do not need to download either. Use the integrated GPS in the iPhone (If you have the iPhone or iPod touch the original, you have to buy the TomTom Car Kit iPhone because Bult-GPS) has turn-by-turn directions, maps TomTom Traffic Local (requires connection The Internet via 3G, EDGE, Wi-Fi) that allows the application to know the traffic information and can redirect you to a better route if problems arise, a function music playback, support multi-touch (pinch to zoom in and out), and a modern and more user-friendly interface. justinxtreme@live.com

Review: NAVIGON turn by turn GPS for iPhone 3G/3GS (North America)