In that case, get whatever fits your needs better.
If you're planning on HDV editing in the near future, get something with a HDV resolution to save the costs in the future.
Another thing to consider is the new screens - XBrite, TruBrite etc' - the ones with the glossy screen - they are less comfortable to use in daylight.
For someone as careful as you I would recommend you'll look at gamers laptops, they really deliver maximum performance while keeping the mobility issue going.
One more thing to consider when buying one of the newer laptops (more gentle) is a good case, padded and shock absorbing, a 1000-2000 dollars laptop needs more attention than a 500 dollars one.
Another company I forgot to mention is Asus, it seems that people like them, I have no experience with them as they didn't fulfill my needs.
In any case, reading about the model you want in the forums (professional forums), any problems you might encounter, service, etc' is always a good idea.