Id reccomend just buying a bog standard laptop that can handle 1 copy of wow incase u ever need to play on the move. Then a bog standard quad core desktop. With a nice overclock on the desktop you will manage 5 wows easy. Laptops just arent practical for multiboxing. Yes there are gaming laptops out there that you could multi box on easily. But I cant see any situation where Id specifically want to multibox on the laptop rather than a desktop. Even if I was going to a friends, Id sooner take my desktop round there.