how about a laptop....

hey whats goin on everybody. as some of you may know(well the ones that have known me from before) im a us marine. yehaa. anyways, i need a laptop so when i ship out overseas on deployment i wont be bored and will still be able to kick everyones *** on cs. ive been looking into the alienware area 51-m. its pretty tight. its a little expensive but thats what military loans are for =). but ive read some reviews on it and it says it gets very short battery life. that dosent bother me much cause it comes with an ac adapter and i know i can just plug it in most places i go. but is it really the best one out there? performance wise i mean. plz give your opinion on it if you could. thanks