Hello and welcome to the forums
Unfortunately there are no "gaming" laptops in that price range, the best VGA you can find in those laptops will be something like Intel 4500M HD which is one of the lowest performers in gaming, so you have raise your budget in order to get a laptop with a good discrete VGA.
yeah, but if you want a bad ass looking laptop to type on you can get a used panasonic toughbook for like 320 on newegg or tigerdirect. I looked at getting one just for the water proof indestructability. if you are looking for a gaming/multimediaish laptop and can spend 5-8oo I posted links to a few with decent graphics cards, ram and gpus in another post. Cheapest worth buying that I fouund was a refurb that was link 505ish bones.
You may have some difficulty finding a laptop in that price range. I suggest you check out a tool called PC Scout. You can search by gaming laptops to see examples of some of the gaming laptops are available, and then use the side-by-side comparison tool to compare the specs of your top choices. This will help give an idea of what gaming laptops are available at various price points: http://www.microsoft.com/Windows/pc-scout/laptop-set-cr....