which laptop is best for animation

Suggest you steer away from considering Gaming / other performance GPU based laptops. You need to focus on Workstation Laptops, these have Quadro or Fire GPUs, and normally Xeon or i7s to handle the demands of the applications. Further as a laptop your DOUBLE the cost normal for a Desktop because your trying to squeeze it all into a small, highly susceptible to heat, needs to be lightweight environment.

Simple Google https://www.google.com/search?q=workstation+laptop&rlz=1C1SAVU_enUS551US551&oq=Workstation+&aqs=chrome.1.69i57j0l2j69i59j0l2.4343j0j1&sourceid=chrome&es_sm=122&ie=UTF-8

provides right off these:
http://shop.lenovo.com/us/en/laptops/thinkpad/w-series/w530/
http://www.dell.com/us/business/p/precision-laptops
and even a review for yoru consideration and some details to help you decide as well
http://www.notebookcheck.net/Top-10-Workstation-Laptops.65537.0.html