A dual core processor is significant and the latest in laptop processor technology.
What about the Intel Core Duo or Amd Turion x2 for laptops. Excellent processors enhancing the digital life of your computer and making it handle high demanding applications.
A Graphics card is very important and a good one will go well with a dual core processor , Nvidia or ATI.
I have an Acer Aspire and would say that since they have brought out their dual core Intel range with the latest ATI Graphics cards they are excellent quality.
Have a look at some of them on Comet