suggest laptop under 55 k for maya,3ds max

suggest laptop under 55,000 rs
Mainstream; 15" - 16" screen
i will be taking this laptop for animation,designing and some gaming also
should last at least 3 years.

and which brands after sale service is good in india?

have seen

dell studio
xps 15 with i5 processor and 420 m graphics card

asus n61jv
Intel® Core™ i5 Processor 450M(2.4G, 3M) : GHz
Main Memory 4 GB DDR3 1066
Display 16" HD (1366x768) 7” WVGA (touch panel/sun readable)
Video Graphics & Memory NV GT325M 1GB DDR3 VRAM

lenovo
Core™ i5-460M
4G DDR3 1066MHz
1GB Graphics ATI Mobility Radeon HD 5730 / 15.6 HD LED

Acer Aspire 5745G
Intel Core i5-430M 2.26-GHz processor
4GB DDR3
Nvidia GeForce GT 330M (1GB)

any of them is good or not?


thanks