For anything 3D, the Precision mobile workstations are the systems of choice. There is no such thing as an international warranty - you can, if you follow the pre-requisites, transfer a warranty from one country to the other (which requires onsite service be added at purchase, AND that the system in question be sold in your transfer-to market).    
Hello, i'm a designer and i want to bye a laptop for 3D modelling.  First question - what model from Dell Laptops doing it better than others? Secondary - a need a International dell-suport on it. How can i get it in India? (i'll buy it India becouse now i'm here)
Buying a laptop