a tip with laptops, stick to ebay and look at the 'new' laptops on there from ebay shops,
i have scored a few cheap laptops that are brand new still sealed in the box with full manufacturer warranty in one case even less than half the rrp.
best advice i can give you when choosing a laptop is to buy the highest spec laptop you can afford, that way it will last you.
i wouldnt take much notice of the battery life on the spec sheets as if you really cared about it you would already know that you should be pricing a bigger battery rather than counting on the standard one.
the main brands of laptop that id be looking at are HP and DELL, ive never had any problems with these 2 brands. if you do get a dell laptop from ebay make sure its not being sold because the owner is too lazy to send the battery back from the recall a while ago (exploding laptops)
the laptop i am using is now discontinued but it is classed as a desktop replacement (HP Pavillion dv5200) and i got it for just over $1k, its a powerhouse and will last for years.
also avoid onboard graphics, they are just plain crap.