[ moved to the Premiere Pro forum ]
Laptop Video Editing PC
Buy a Desktop Video Editing PC
-ADK Kudos http://forums.adobe.com/thread/877201
Build a Desktop Video Editing PC
-ideas inside http://www.pacifier.com/~jtsmith/ADOBE.HTM
[moved to hardware forum]
Since most HD video these days is H.264, I'd say go with an i7 3770K or an i7 3930K processor at a minimum, with 8 or 12 GB of memory respectively.