Poor mouse

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Waiting for this babe to be my side  

Guys,
I plan to buy a gaming mouse, However, there are many brands of choice。
I spotted a few models are:
Logitech G9X Laser
Logitech G500
SteelSeries Xai Laser
SteelSeries Ikari Laser
SteelSeries Sensei
Razer Imperator

^^^^^^^^^^^^^^^
which 1???
I mainly play First Person Shooter Game. CSS, TF2, COD, BTF, etc..
Note: Scrolling can be adjust fast or slow, because i use that for bind "JUMP" key in any game.
Now using china ??? brand mouse. (When i buy new Laptop, get it free gift mouse, RM10 only.)

Well, based on what i've digged, it's more on the hardware side problem...

diff sensor.
xornet from the specs seems to be adns-3050...no big brand using it yet...but seems to be made for even more extremely low sens
spawn is adns-3090, which is basically the same as the adns-3888 DA BE sensor.

the xornet driver makes more sense tho, dpi steps from 500, 1000 and 2000.
stupid spawn is 800, 1800 and 3500.
wonder wtf is so hard for them to offer fully adjustable dpi.

got wad good mouse to replace mx518? kinzu i tried jus now but too small. so its either xai or sensei. but which ah? jus now no demo unit to try zzz