I recently Replaced Sony in dash AM/FM Cassette player with the Kenwood KVT-817DVD Monitor with DVD Receiver. It has too many features to list, but here are some of the details.
* 7.0 inch Wide Color TFT Active Matrix Display
* Full-automatic Open/Close with slide and
angle adjustments
* Interactive Touchscreen Control with GUI
* Audio Easy Control Mode while Playing Visual
Source
* Selectable Wall Paper (5 Patterns)
* Secondary Display - 5 x 7 Dot Matrix LCD
(Color: Blue, Red & Green)
* Installer/Backup Memory of Audio/Video Setup
* Maximum Output Power : 50W x 4
* Gold Plated 5.1ch Preouts with 5V Pre-output
Level (Front/ Rear/ Center/ Subwoofer)
* 2 RCA AV Inputs / 1 RCA AV Output
* Video Input for Rear View Camera
* RGB Input for Navigation System
* Dolby Pro Logic II / dts surround
* SRS WOW / Circle Surround Automotive
* 4 Band Parametric EQ/ Digital X'over/
Listening Position Control
* DVD Menu Direct Touchscreen Control
* MPEG 1/2 Video files (.mpg) and JPEG files
Playback
* Dual Zone Source & Volume Control
* DVD±R/RW Compatible
* External Media Control - iPod Ready
This required some modifications of the center console and cabinetry. This can be done over a weekend. The most time consuming parts where building the box to hold the 15" Road Rage Flat Panel TV and running the wires throughout the coach.

Here's a picture of the unit in Navigation Mode. The beauty of this set up is I can have the navigation running in dash and a movie running on the television.

Nice work! Crutchfield has it here; discontinued, but still in stock.

Antenna for GPS Navigation System. Kenwood KNA-G510