EDIT: I got a free laptop with a screen that has lost it's sync, so I think I will use that

Ok after destroying my last carputer, I've made a parts list of what I would like to hopefully get ($$$ permitting!)
Shuttle XPC SB61G2
2.4Ghz P4
256MB DDR RAM
150W Opus for the Shuttle.
7" Xenarc 700TSV
2.5" 60GB Laptop Hdd
USB HDTV Tuner
DVD
GPS

I'll probably chuck in an 256MB ATi RADEON 9550 so I have dual VGA output (I already have a Lilliput LCD).

Would this system be able to be powered by the Opus? I have a feeling it will be a bit too much to pull from it. Probably have to reduce the speed of processor to get enough power. Is 2.4Ghz powerful enough to watch a DVD/Divx on one monitor, and still have GPS running on the other?

edit: Decided to split the thread up hehehe

Thanks!