Necrons: Overpower?

Hey guys finally was able to sit down and change the screen name lol. Anyway I played a 2500 point game against a SM player today. Completely wiped the board with him..... It made me feel a little guilty about how powerful Necrons are at higher point limits. I'm currently trying to find a way for them not to be as broken. I have considered simply taking less points but I'm not sure thats the answer....maybe WBB on 5+?