ASUS 1005PX is available for 14k..it has an Intel Atom processor, which just optimally powers your netbook to handle all that a netbook is supposed to. Do consider it. Intel Atom based netbooks start from as low as 10-11k.
You can check out the HP 210 Mini..it's an atom based netbook..so you won't have any probs regarding the processor..should cost you around 17k. Or search around for some other atom based netbooks. They start from around 11-12k.
I have the same requirement as the OP had an year ago. What is the suggested Netbook at this time. I am looking for something lighter than the HP DM1Z.