Sony’s new NV-U3DV navigation system should turn a few heads with its large 6.1-inch screen. But that’s not the only thing it has going for it. It sports a 480×272 resolution which will give you bigger buttons and more map space, along with some other unique features like Position+ G, which uses an accelerometer, gyro-sensor, and pressure sensors which help it figure out the direction of the vehicle.

Aside from those features, it has all the usual stuff, even mobile TV in Japan, live traffic information, and various guides from PetaMap. No word on a release in the states just yet, but those in Japan can pick one up in August for around $700.

Sony took the wraps today off an expanded line up of its nav-u personal navigation devices. These new models – the NV-U94T, NV-U84, NV-U74T and NV-U44 – price around $400, $350, $300 and $250 respectively and will be available in September.

Sony says new features of these four just added nav-u GPS units include more brand icons, search functionality and photo viewing features. The top dog of this group is the NV-U94T, adding “a photo viewer, audio/video player and stereo Bluetooth technology for streaming audio and making hands-free phone calls using compatible devices.” You can get full details on these models after the jump.