FlintIronStagg :
this thread derailed in a bad way.
children, lets get to the point for the OP's sake.
Fortunately I already answered the post for the OP.
*mod edit: lets not resume arguing*
Also, i'll post something that might help people in the future. If you're looking for a "gaming laptop", don't get sold by going to a department store and getting a laptop that the salesmen says is "really good". 99% of the time, the laptop they are trying to sell you has some sort of x20 or x300 GPU in it, with a decent CPU and ram.
The salesmen or women doesn't know that for gaming the most important part is the GPU, and resolution plays a big roll in gaming. For example, the OPs m14x has a 555m gtx in it, which is decent for the small 14" 1366 x 798 ish resolution that the monitor has.
But if you have the same (or worst) GPU on a 1920 x 1080 17" laptop, it's going to be a really bad at playing games.
Many "gaming" or high end laptops will claim great things, but when you read the stats you'll see Nvidia 520m GTX GPU!!!! and it gets about 15 FPS in skyrim lol.
Best thing you can do is research laptops you want to buy and find some benchmarks of the GPU the laptop has. CPU and such will play a small factor in FPS gains/loss, but you will get a general idea of how powerful a gaming laptop is by looking at mobile GPU benchmarks, which are very easy to find on google.
So bottom line, before you buy any laptop for gaming, check the GPU benchmarks. Also note that 15" laptops can't fit very nice/big GPU setups. So be very warry of 15" laptops with 1920x1080 screens, more then likely the GPU won't be strong enough to play games smoothly at it's native resolution.
If you're not worried about the extra weight, Clevo / alienware make some pretty hefty beasts with high end 17" laptops that fit SLI / crossfire configurations of high end GPUs like 580m GTX. They are the best you can get, but are very thick, and will cost you around 3000 bucks.
Hope it helps.