Lag, on a mouse? Oh right, people still buy wireless mice for no good reason at all and then complain about all of the problems that introduces (lag, signal drops, batteries, weight, etc).
I'd recommend a Logitech MX 518/G 400/M 500. They come with this novel new concept called a wire, it is like wireless but with far better reliability and speed.
If you're going to be a dick about it, why bother to respond?