Excellent! Go for it!
Windows 8.1 is now out and its the smoothest OS out there, don't care about these people moaning just because they can't purchase a legit copy of Windows 8.
RAM is good since even COD Ghosts require AT LEAST 6GB of RAM to play. And if you want to multi task, install things like Rainmeter you do need more RAM. Its 2013 after all.
Even my year old laptop has 8GB of RAM, 3630QM, GT650M 2GB, 1TB HDD with Windows 8 and HD+ display, runs everything perfectly. :p
Try looking for a 4th gen i7 for much better battery backup. And a GTX700 series if your budget allows.
P.S. In the future you can easily replace HDD and increase RAM , so focus more on GPU and CPU as they cannot be upgraded.
