Those laptops are great choices, but they're outdated and for the price you can get a better value. If you don't mind spending a little bit more, Lenovo's website sells a great Y50 with better technical specifications for about $50 more ($1,049).
It contains a new Intel i7 Processor with an 860M GTX, which is more powerful with less heat generation than the 755M SLI (http/www.notebookcheck.net/NVIDIA-GeForce-GTX-860M.107794.0.html). With the SLI GPU's, you'd run the risk of overheating your laptop.
This also comes with 8GB's of RAM, which is more than enough for gaming or productivity tasks. Let me know if you have any questions