Laptops are never best for video editing, since they're usually built for portability rather than power. They also cost about 50% more than desktops for the same amount of power.
But what type of camcorder is your video coming from?
If you are editign tape-based video, a dual-core processor and 4 gigs of RAM with a 500 gig hard drive should be adequate.
If you are working with AVCHD video, you should go for a quad core or i7 processor running Windows 7 64-bit.
I don't know if they do laptops, but a UK http://3xs.scan.co.uk/Category.asp?SystemMasterCategoryID=14 site I've seen recommended
For HD video, you need...
-the newer sandy bridge 2720 or 2820 quad processor
-and nvidia graphics preferably the 460m, 485m is a bit much
-1280x900 display with OpenGL 2.0-compatible graphics card
-and 8 or 16 gig ram and Win7 64bit Pro
-and 2 internal 7200 HDDs minimum