If they won't help you do this then it's a very bad sign and an indication of their future support.
I have been looking around at gaming laptops for sometime now, and it seems to me that the best deals can be found using shops like sager that allow you to configure your own laptop. Now being based in the UK sager were out of the question as the shipping cost would be huge. On the up side I have manged to find a good shop selling configurable schenker notebooks. (http://mysn.co.uk)
My budget is 750 - 900 pounds and for that I obviously want the best gaming laptop I can buy. So I have been swaying towards the XMG R722 (http://mysn.co.uk/xmg-A722)
Now I was wondering in your opinion what is the best way to configure that notebook / Is there something else entirely I should be looking at? But with a bit of luck you will only answer the first one.