TimelineX 4830TG, i5-2410M + GT540M@RM2499
A43Sv, i5-2410M + Nvidia GT540M(1GB)@RM2399, [6-cell 4400mAH]
Inspiron 14R, i5-2410M + AMD HD6630@RM2349

My budget would be less than RM2500. Currently looking into these three. I would like to ask how many years of warranty is provided by default for the respective models above? Also in terms of quality build, which one is more reliable and have there been any issues with any of the laptops above? For GPU, is there any noticeable performances variance? And lastly Asus's 6 cell 4400mh batteries meaning it has longer battery life compared to the other two?

Help will be much appreciated. And i am still open for other options.
Thank you.