However your hardcore desktop gamer will be upset by this. Simcity is going to be just fine. Look at Notebookcheck notes on the gt635m.
-> http://www.notebookcheck.net/NVIDIA-GeForce-GT-635M.66964.0.html finds many games will have to run at less than "ultra" settings.

Again, "gamers" may be upset.

As to the CPU, this is worth knowing:
"Our tests demonstrate fairly little difference between a $225 LGA 1155 Core i5-2500K and a $1000 LGA 2011 Core i7-3960X, even when three-way graphics card configurations are involved. It turns out that memory bandwidth and PCIe throughput don't hold back the performance of existing Sandy Bridge-based machines. "
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-4.html

So a fair choice on the CPU.
Bob