ive got the razer mamba , great mouse .. i had to change when my g9 crashed.
dont know if thats best mouse ever , i guess everyone say the same about his mouse once you get used to it.
For all games i need to set sensi around 0.50-1 even with that sensi is way to high ( not talking about ET) but other games , you play 1 hour you go throw up , advantage you keep a decent body (j/k)