My self a gamer.
So i do have this g603 model.
I do not use it .
I have really play longtime with a m170
Shop M170 Mouse. Features reliable 2.4 gHz wireless, 12 Month battery, plug and play receiver, ambidextrous shape, comfortable design, and more
www.logitech.com
And today i use Razer Orochi V2
Lightest gaming mice with a long-lasting battery life, armed with both Razer HyperSpeed Wireless & Bluetooth modes for a perfect companion on the go.
www.razer.com
You need to see what style mouse systeem u use.
My self use a spider finger systeem.
I play a lot of sniper so i need not a lot of dpi .
So really i still use a lot m170 for it.
People think you need a lot of dpi.
For people who not know what i mean see link.
There are 3 main types of mouse grips: claw grip, palm grip, and fingertip grip, each has advantages and disadvantages depending on use case.
www.daskeyboard.com
I have switch to a other finger systeem .
One reason is the heavy style of use on a big mouse.