I am also considering buying a sub 25k laptop with 15.6'' screen for running linux and programming tasks with some surfing, youtube & videos. No gaming.
I shortlisted 2 models:
1. Fujitsu AH5332 (+ve: i3, 4gb, usb 3.0)
2. Acer Gateway NE56R (+ve: 1+1 warranty, 128mb gfx, hd webcam, better build...