Asus G53SX-S1208V - Rm 3999
Asus G53SX-S1208V - Intel Core I7-2670QM 2.2 / 4GB RAM / 500GB+500GB HDD / NVIDIA GTX560M 2GB / 15'6 / DVD / W7HP / 2 YEAR WARRANTY
Asus G53SX-IX199V - Rm 4999
Asus G53SX-IX199V - Intel Core I7-2670QM 2.2 / 8GB RAM / 650GB+640GB HDD / NVIDIA GTX560M 2GB / 15'6 / DVD / W7HP / 2 YEAR WARRANTY
Asus G74SX-91185V - Rm 5999
Asus G74SX-91185V - Intel Core I7-2670QM 2.2 / 8GB RAM / 650GB+640GB HDD / NVIDIA GTX560M 3GB / 17'3 / DVD / W7HP / 2 YEAR WARRANTY

i see the specification looks the same but y the price can go so far from each other? anyway send me a pm for the best price of these:)