Why don't you call the "established" manufacturers on their "customer support" numbers and ask them that you want to buy an "Intel" based Laptop/Notebook without pre-installed OS? When I say 'Intel Based' I am talking about Graphics. AMD makes equally good processors and are relatively cheap.
Edit: By the way, IMO ASUS have very good battery back up... My EEEPC gives me close to 11hrs power on Battery.
Check this out