I believe that this is the perfect laptop for you.http://www.amazon.com/ASUS-X54C-ES91-15-6-Inch-Laptop-Black/dp/B006O7FM0G/ref=sr_1_1?m=ATVPDKIKX0DER&s=pc&ie=UTF8&qid=1327966125&sr=1-1
It is an ASUS brand, and uses a Dual core Pentium version of the new Sandy Bridge chips.
It includes HD3000 graphics which is perfect for light gaming/media.
The harddrive is 320Gb, which is short of 500Gb but Imo shouldn't really be a problem.
The Processor is a Dual Core 2.2Ghz.
At $399 with Free Shipping this laptop will leave you satisfied, and with some spare cash in the pocket.