Depends where your location is first, that would help...
Also whats your budget?
Tips, I would first see how much money you have to spend on the laptop, next is to find a good reliable place to buy the laptop. I would try staying away from places like ebay. Even though they may have good feed back, if something happens like a HDD failure for example you are stuffed support wise. I would look for a online laptop shop that offers after sale support and warrenty. This way you are covered if anything happens.