Laptop for 3d work - Architect



My friend's dad is looking for a new laptop, so he has asked me for some help but my knowledge on this matter is limited.

He's looking for a very powerful laptop and there's practically no price limitation :S He's going to be using it for his work in China where he runs his own architecture-business-thingy.

So he's basically asking for the best laptop on the market. He won't be getting a stationary as he needs to be able to carry it with him on business trips. There are no preferences when it comes to brands.

Any advice? :D I'm guessing quadcore and gtx 280 or something would be best?