Alienware M18x $2000 base price
Core i7 2670QM 2.2GHz (3.1GHz w/Turbo Boost) CPU, 4GB, 500GB HDD, GTX 560M graphics card.
But it does have options for
Dual 2GB Radeon HD 6990M CrossFireX
8GB RAM, SSD and RAID0 options,
Overclocked Core i7 2960XM CPU.
Something along those lines would meet your tech specs.
You can price it out for yourself.