Any suggestions?? [seriously need help]

okay so i was planning on surprising someone very special to me with their very own laptop [since they're always using mine >< or the school pc xD

and i'm a bit stuck .-.  i need to know what's the BEST gaming laptop 

cause we both have sims 2 and the pc they have can't play it so i wanted to get something that will play sims 2 without any problems at all

like fast, and very spacy~ [preferribly 4gb :3

and under the price of $400 

so any suggestions?? OH and i need it before july >< 

thank you all in advance!!! <333333