I just bought a custom Sony Vaio EB series laptop. I won't receive it until about Dec. 10th, but with my student discount, I got these specs for $790 (before tax).
Intel® Core™ i5-460M processor (2.53GHz) with Turbo Boost up to 2.80GHz
4 GB DDR3 ram
ATI Mobility Radeon™ HD 5650 GPU (1GB VRAM)
320 GB 5400 rpm
Your processor and HDD are great, but the ATI GPU might limit your performance a bit.