I am new here. Dont have much experience assembling computers in general, or even what fits with what. After a few hours here I still haven't really found a solution to my project.

I have 2005 GMC Yukon and want to put a carputer in it. I will be ordering a 12.1 SXGA LCD panel with VGA, DVI, and HDMI inputs.

I want a computer that can output 5.1 audio to my Audio Control DQS(digital 5.1 EQ).
I also want it to have 5.1 audio input from a PS3 slim I just bought.
I simply want to be able to put a blu-ray movie in the PS3, with video output through hdmi directly to the monitor, and have the computer take in and output 5.1 to my sound system.

I do not have the biggest budget for a crazy setup, as much as I would love one. I simply want to run Centrafuse on top of XP, or Windows 7 even, and have the necessary hardware to do what I want with 5.1 audio.

So my question is, what hardware do I need to get the Intel BLKD945GCLF2 Mini-ITX Motherboard running with 5.1 input/output as well as DVI monitor output?

Thanks in advance