IMO the best ~RM100 mouse would be the Razer Krait, but it's so hard to find it in stores these days =/

Well, im just listing out his possible options, that's all...
Well, if you wanna go G400 with FPS, then you are well-informed that G400 do has prediction that CANNOT be turned off....
Yeah... Razer Krait extinct already.... one of the amazing snakes species by Razer....

dunno in LYP but its RM99 in ModernoPc's website

Well, not saying that G400 is not good for FPS, just that some of the users wouldnt like predictions on their mouse, especially for sniper players as predictions may compromise accuracy.... However, if you are not hardcore FPS players that are very sensitive to the control, i think it's all right...
For CM Xornet, im not so sure about the price... basically it is a scaled down CM Spawn... with the same shape, same design, same switches, just different color scheme and a different sensor....

Huh? What you mean by that?
If you mean the tracking sensitivity, then the G400 with 3000+ dpi compared to the Xornet's 2500 dpi is clear.
However, if you mean the tracking issues such as predictions, +- acceleration, lift-off distance, tracking surfaces and etc. then i cant really comment on that as me myself is still not very "expert" in that field....
Well, you can always ask Google for all your inquiries.... there are reviews all over the internet, so what i tell you is...

First you narrow down your choices from recommendations from sifus here, then you google all the informations you need from the internet, lastly you go to the shops and try them for yourself as there is no such thing as the best mouse/ most comfortable mouse in this world, the best mouse to you is the mouse that suits you the most....

Try do some homework before going crazy because of the influx of information provided by people....

I see... then good 

So... your verdict is???  G400 or Xornet?   

I see... then do come back and tell us what you get once you got it...

Well not to say that they are bad... they're useable in a sense but its still a cheapo mouse imho... I have several Gigabytes, Rapoo, Powerlogic and whatchamacallit brands of mouse that I've bought over the years and believe me they don't last too long, the tracking sucked under normal usage (I'm talking about normal Excel here)

But... u get what u paid for I guess... so far Logitech MX518 is still a great survivor

i killed my mouse.
RIP dear Kinzu.

umm no. after replacing the faulty left click with a new omron switch, the sensor died for no reason

dont touch the gigabyte

agree with everdying, don't touch gigabyte gaming mouse, their quality is not good enough for what you pay for.

My 1st gigabyte mouse M8000 wheel died after 2 month, and i taken another chance with gigabyte mouse M8000X left click died(not button die, DRIVER FAILURE on left click)

Which version? Now got many versions of death adders.... the old 3G, refresh 3.5G, Black Edition, Transformers Edition... so which?

It really looks nice .. How much is it and where u get it ? Btw the dpi is it 3.5k or 1.8k ?

Edit: Nvm I saw the box d, isnt the new one 3.5G ?

White scroll wheel and white LED? I prefer all white if available

Yeah... was thinking of a whole white death adder... until i saw the picture...