Habu - A Gaming mouse from Microsoft and Razer
 

First gaming mouse jointly developed my Microsoft and Razer. The fact that Habu is a wired
mouse, makes it great for gamers. Yes, the wire will limit the movement up to certain degree
but the benefits for having the wire outweighs that con. For example a term like Always-On Mode
cuts the latency practically to zero. Imagine what this would do to the operating times with a
wireless mouse

Exchangeable side buttons...mmmkay... What about a left handeds?

You got to buy the regular Razer lineup, which are the only high performance mouses for left handed people.