Sony's do have nice screens though personally I hate the proliferation of glossy displays, hence why I am typing on a HP business due to the matte finish
I would say that laptop screens are still limited and hate to say it, but you hook up a laptop to a external monitor and you instantly see the difference in colour reproduction. However I am no expert and might be talking too much. I only got my external for the DVDs, but now just cannot do editing on the laptop's screen anymore
Edit: I can qualify my comments, but as you are looking for a laptop, I hate to kill your budget