Be careful with getting the screen. I have bought 3 screens on eBay, and they have all died in my car. The last one I bought was from a seller authorized by Lilliput, and the screen still died. So, be careful with the screen. For bench testing, you can buy a nice 12V power supply at Radio Shack, or you can go the way I did and use an old PC power supply to power everything. Recent model cars have more and more complicated sound systems, so you might want to consider buying an amp for your car and hooking it to the car PC unless you want to use the factory HU.