I have a 2004 lancer, I'm happy with the stock speakers and the Pioneer stereo that I have right now. I want to basically put in a computer of some sort, and fab in a DVD drive below the stereo and HVAC controls, in the little pocket there. Possibly a USB hub too. I want to basically be able to take a flash drive, put the tunes in that I want, and organize them, play them in something like winamp or whatever, run the system on linux, possibly.
I know I want to have a computer in my car, with a 7-10" widescreen display which I can still take with me when I get out of the car. With ease of access to add new files and put in interface devices, and possibly have a keyboard hooked in as well to use for internet, perhaps a smaller one. I'm wondering if anyone has ideas on how to go from here, I thought about a 300W inverter direct to fuse box. I want to make it rock hard but not be

so I am trying to figure this out, I'm looking to buy components over the next year and start to install.