Ok. so Processor is the most important as it's not upgradeable, so keep that in mind. you can get a 2gig of ram now and upgrade to 4gig later.
at the top of the Laptop forum is a Start here guide that has a list of about 20 questions for you to post the answers to so we can better help you.
Do you plan to do gaming?
What size screen do you want?
Do you plan to watch a lot of movies?
How much had drive space will you need?