Still in the planning stage. Decided to use my laptop for carpc. I still need another power supply to power external devices such as

1) Touchscreen LCD
2) Slim DVD-rom
3) Creative Audigy 2 NX
4) USB 2.0 Pcmcia(my laptop only comes with USB 1.1)

I was thinking of using 2 Opus POL DC-DC smart power supply (since max power is only 15W for 1), but anyone has any better idea? any advice?

Let me thank you guys before hand.