Thread: Which PSU for this setup?

I'm in the process of building a CarPc and I'm kinda stuck when it comes down to the Power Supply.
I've got the following hardware in my car:

- VIA EBGA EPIA-MII12000
- 512 Mb PC2700
- 80Gb IDE HDD
- Slimline DVD
- BU-GPS receiver
- Sweex USB Webcam (rearview cam)
- Lilliput 7" TFT with USB Touchscreen
- 1Gb USB Memory Stick

The Liliput has it's own adapter, the rest will use the PSU.

I currently have a 150 Watt 12v to 220v Converter, which I could use to power the pc via a normal PSU. But how am I going to handle startup/ shutdown and short stops at gasstations? (I don't want to shut down the pc then)

I've also looked online and found an Opus 150 Watt DC-DC PSU, I like this better because of the startup and shutdown functions, but is it powerfull enough to supply power to my system?