The two best mice money can buy you when it comes to FPS games are the Razer Deathadder and the Logitech g502. They both have 1000hz capabilities and both have tier 1 sensors. Both are around the $50 USD mark, i personally love the deathadder and couldn’t recommend it more, but check them both out and decide which style would fit your hand better or failing that which one is more aesthetically pleasing to you.