let me get this straight...you want a computer with wireless internet in the car to play mp3s and videos? errr..why not just download everything at your desk and burn it to a CD? Better yet, why not get rid of the computer idea and put a vcd/svcd/dvd/mp3 player under the seat? And you dont have to wory about an inverter either. That's what I idd and it's definitely a third of what you're going to pay.