I have recently purchased a Mamba TE, I have until Wednesday to return it for full money back. I have heard many complaints about the mouse and have noticed the Z-axis liftoff bug, this hasn't bothered me much but I know it will most likely bother me after a longer period of use. I was looking at the Lancehead TE which has the optical laser, everyone is saying the optical is better as it does not have hardware acceleration, I am looking for some opinions on this. Should I return it and purchase the Lancehead TE? What is your experience with both of these?