My purpose is to get a comp or a laptop to do some video editiing.

I need to copy stuff from the TV onto my comp.
I need a fast editing comp/laptop and lots and lots of space.

My choices are to either get a tablet pc or laptop and get hte dazzle for video recording and some external hd's.

Or the multimedia machine from Alienware that cannot be portable.
like the navigator extreme or something.

the navigator extreme is my best choice, i'm sure, but i need osme portability, if possible.
SO.. what should i get?
thx