You get what you pay for with laptops. I buy most of my supplies from newegg. A gaming laptop you are going to pay through the nose. In two years a baseline laptop will have the same performance for half the price. I would lean towards a middle of the road laptop. Dell would be my preference for gaming, and IBM/Lenova for business.
You should look at the videocard and lcd display, moreso then the cpu for a gaming laptop.
Its hard to pack a nice videocard in a laptop due to heat and battery life. Some of the new laptops today come with two video cards, one lowpower for regular use and a higher quality one for video/gaming.
Good Luck, Steve