The one you have selected there is a very impressive 17" gaming laptop.
It is an older model with a 675m.
The 675m i based upon the older Fermi core and is a downclocked 560Ti.
It plays games very well and scores around 3600P on 3dmark11 at stock with up-to-date drivers.
One word of warning. The price I see everywhere is between $1200-1300 for now.
For that price, you might be able to afford a 670mx (newer Kepler core, slightly faster, less power draw, less heat) and on holiday deals might be able to afford a 675mx if you already have an OS.
You wouldn't go wrong with an MSI GT70... but may be able to stretch your budget a bit more with a white box MSI or Sager from a custom retailer like xoticpc, powernotebooks, or gentechpc. (or similar)
I'd do some comparison shopping.