Arma 3 vs New Mouse

Should I get a New mouse (Logitech G400) or Arma 3 Beta? The mouse I'm currently using is a Logitech M100.

OP, can you at once; POST ON-TOPIC QUESTIONS IN THE APPROPRIATE SECTION? I do not want to be moving them ever...

Mouse for the long run, if you plan on playing Dayz the standalone comes out soon for $15

I just got a new mouse today and I think it was a much better purchase than a new game.   Already have plenty of games anyways  :P

Just be sure to get a decent mousepad if you're going for one with an optical sensor because than can help too