Buying a new laptop
youll want an intel haswell based i5 (i7 QM would be preferred) and a Nvidia 850, 860, or 870 GPU.
the rest will fill in when you are at that level.
Hp has a 15z with a 840 (they SHOULD be making it with the 850 and 860 very soon) for 649. IBM and Asus have them too (but are 800-900)
Desktop: 4790k@4.6ghz-1.25v, AMD 295×2, 32GB 1866CL10 RAM, 850Evo 500GB SSD
Laptop: M6600 – 2720QM, AMD HD6970M, 32GB 1600CL9 RAM, Arc100 480GB SSD
Laptop: M6600 – 2720QM, AMD HD6970M, 32GB 1600CL9 RAM, Arc100 480GB SSD