I am about to build my first carpc in my 2004 Mazda 3 Sport. My needs will be mainly music, gps, internet radio (via phone tethering). I plan on eventually running an 8" sub in the trunk (much later in the build) along with the 4 stock door speakers and stock door mounted tweeters. The main question I have is which Power Supply/Regulator should I go with? I've managed to read until I am reading in circles but I think I have come up with the following component list. Does anyone have any opinions/comments on the following specs? Is the motherboard overkill? Will HDMI be better than VGA or will the low resolution make HDMI pointless?
Motherboard/CPU/GPU - ASUS AT3IONT-I Deluxe Atom 330 DDR3 NVIDIA ION mITX
Memory - 4GB DDR3
OS - Windows 7 or possibly some flavour of Linux (more desirable to me but much more work I think)
Power - M2-ATX or DSX12VD 140W DC-DC Regulator
Case - Morex 5677 Case
Frontend - Undecided
Monitor - Lilliput EBY701 or 669GL-70NP/C/T ( Dual DIN mp3car setup for Mazda3 http://store.mp3car.com/Direct_Fit_D..._p/dsh-021.htm )
Thanks for any responses.