Let's read this.
"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

OK so your CPUs are more than up to the task but for games it's all about the GPU. Before I share how I compare GPUs you need to shop for the i5 laptops but with better GPUs.

I use notebookcheck in my google search and then the GPU.

So notebookcheck 4000 finds http://www.notebookcheck.net/Intel-HD-Graphics-4000.69168.0.html

A sea of RED for gaming.

OK same search but with the "nvidia nvs 4200" after notebookcheck finds http://www.notebookcheck.net/NVIDIA-NVS-4200M.47343.0.html

Slightly better it seems but a gamer this is not. I'd keep shopping but look for i5 powered machines with better GPUs.