The two best gaming mice in my opinion are Logitech G5 or the Razer Deathadder. The G9 looks too uncomfortable to me, but it has great features.
The G5 has extra modifications to it such as weights and untangle-able wire, and Logitech is said to have better quality than Razer (Razer has had many problems with some of its mice, like the Lachesis)
If you search up "Best selling gaming mouse"in Google the Razer Deathadder appears
Both mice seem to be good, so pick one