Originally Posted by Nameless one 
If I may suggest it might be better to go for classical desktop PC.You get more bang for buck in performance+easier and cheaper upgrade but what is also important you will have big screen for multiple well organized quickbars and big keyboard+and fast mouse.Last 2 might not seem very relevant but in PvP it can mean difference between wining and loosing(and somewhat less in PvE).Anyway I see you are more interested in laptop but still take this in consideration.
+1
Nothing beats playing on a larger monitor with a keyboard and mouse that are geared towards gaming. I find it far more immersive than trying to game on a laptop. Unless mobility is a requirement, I definitely recommend a desktop setup.