Hi Everybody,
First off thanks in advance for all feedback. This forum is very helpful and it ROCKS!!
Here is my truckputer, sound system plan so far. Need feedback, suggestions.

Dell SX260 P4 2.66GHZ,1GB of Ram, 160GBHDD XP Pro N got it off eBay $195
Pioneer DVR-K05 in USB Enclosure got it from centri-intl.com $78
Backup Cam got it off eBay $19
USB GPS Receiver already have
Carnetix P2140 DC-DC Regulator getting from MP3Car
In dash Touchscreen ? haven't made my mind up on a specific model yet
Wifi adapter ? haven't made my mind up on a specific model yet
Powered USB 4 port Hub need to buy

Roadrunner is already setup
Going to use IGuidance and my Mio for Navi/

Audio system:
Pioneer DVH-P5000MP for XM, DVD movies need to buy
Elemental Design Nine.2X already have
Elemental Design SQ10 shallow 10" subs need to buy
Pioneer XM Tuner already have

The Pioneer and which ever screen I go with will be installed in the double din opening. The SX260 is going to located under the pass. seat, external dvd burner will be in the center storage compartment. Wifi and GPS will be routed via USB cables to backseat by rear window. Carnetix will be under driver's seat along with XM receiver.
The Subs and amp will be behind rear seats in a custom box. My only problem is which screen to go with. I'm done plenty of research, weeded though alot of thread here on LCD screens. Read the good, the bad, about them, yet I still have no idea which one to use. I really want to use a non-motorized over a motorized model as I currently have a Pioneer AVH-P6500DVD and it no longer opens/closes w/o assistance.
I believe I listed everything, but I'm sure I forgotten to list something.