no 11" isn't to small really. Even the 15" I have today is a bit big on airplanes.
I have been looking at the 13" alienware but I guess the tradeoff for the size is some performance? I can't see that its possible to get it with any bigger card than the 960.. Is it enough for playing entropia and not getting overheated? Is the cpu that's gonna get it worst I guess anyways ^^
My old A m11x r3 is probably inferior to many modern non-gaming laptops due to few generations old technology, but at the time it was released it was top of the pack.
It have i7 Sandy Bridge CPU and Nvidia GT 540M GPU and its good to run game on mix of medium-high settings with playable framerate, however I often opt to play on custom mediumi-sh settings to avoid hairdryer sound of fans
I'm not sure about new line of Alienware but I guess they will be using Intel Skylake (6th generation of CPUs) and Maxwell GPUs. Both of those technologies improved dramatically performance and decreased power use (therefore heat generation) so I think it will be greatly superior to my machine and you will be able to play on very high settings probably without so much cooling needed as my machine.
I would think 960m will be enough and will be good, but I have no experience with that card in laptop.
Investigate and read what people say, but Alienware was always a great choice (although I'm not up to date since few years as I don't need upgrade for occasional travel time).
http://forum.notebookreview.com/forums/alienware.1018/ this is place I usually went to for some research in past. They have loads of subforums for other manufacturers as well...
Edit:
Oh, if you decide to go with AW, they have outlets in EU and NA and you can often buy laptop for few hundred less than from shop. Often those are machines that were returns, some might have been refurbished or some have minor cosmetic imperfections like scratch. It is usually in description.
I had my 2 AW and couple os Dells from their outlets and they were always in perfect condition and saved me a lot of money...