Replying to Purchasing a laptop, need help

I am in the market for a laptop to do several things: Gaming (World of Warcraft), and also editing such as Photoshop and Flash. I am aware that apples are no doubt the best for Photoshop and Flash, but am concerned that they will not be able to run high end video games. Also i have spent a reasonable amount of time searching on different brands websites, and it doesn't seem that i can customize the Video Card on teh iBook which would present a large problem. Furthermore, i don't completely understand the new "M" chips...what would be equal to say a 3.0 Ghz with HT? So anyways waht laptop would you say would be right for me? Let's say top price is $1500, no exceptions.