Well Im thinking of getting a Minit ITX PC but still have no idea about the PSU.

I was thinking of getting the PW-200M PSU (200W DC-DC 12v Mini Power Supply PW-200M Mini ITX PSU on eBay, also Mini ITX, Power Supplies, Desktop PC Components, Computing (end time 11-Jun-08 20:12:13 BST)) but Im still not sure what AC/DC power adapter I need to get ? Will the wattage output of the AC/DC adapter need to match the one of the PSU ? or...

Any help would be great