Sony Nav-u U94t 4.8" screen, and isn't too bad. I had a Navigon 2200 max before it till my dogs ate it. Got the Sony for $149 or something like that a couple of months ago. The Sony has Traffic updates (but u have to pay), and split screen navigation to make it easier to understand how/where to turn off the road. Also, it has blue tooth so you can make and receive calls handsfree with your cellphone. My Navigon had FREE traffic updates for life, and a cool road view. http://www.sonystyle.com/webapp/wcs...10151&langId=-1&productId=8198552921665522590
I use Garmin. You can get it in stand alone unit, or installed in your phone (if compatible) Cool features: 1. Voice prompted real-time turn by turn navigation 2. 3d map display 3. Re-routing on-the-fly (that is, if you miss the turn or exit, it knows and will re-calculate and re-route, so it's very hard to get lost). 4. Pre-loaded directory of businesses,locations of interest,restaurants,etc. 5. Pre-loaded maps (you don't have to be connected to internet to navigate). I have Garmin Mobile XT installed on my cell phone like this: <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/nhaRu_8NWlc&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/nhaRu_8NWlc&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object> What's good about having it on the phone is if you're connected to the internet, the Garmin Mobile XT software will calculate your route with current traffic conditions factored in, and also give you current weather, gas prices near or @ your GPS location. It basically has the features of a standalone Garmin GPS unit, with the portability of having it on your phone.