Cougar 500M vs Cougar 550M mouse

Hello,

I'm looking for a all genres gaming mouse. I play MOBA, MMO, FPS, RPG, RTS, TBS you name it.
Have a pretty big hand 19.5 cm from wrist to tip of middle finger, sort of claw grip.

Am new to gaming mice - i have a Genius x-500 for 2 years now but i think i should find better.

At a local store there is an offer for Cougar 500M (33EUR) and Coungar 550M (44EUR). Haven't seen many opinions on these but they look pretty good in the specs.
http://www.tomshardware.com/news/cougar-550m-500m-gaming-mice,29604.html
https://www.overclockers.co.uk/LP/cougar-500m-550m.php

There is also a Steelseries Kana V2 at about 34EUR.

What's your opinion on what i should pick and why?

Update: I'm putting out the specifications; Kana is no longer at a discount and is close to 550M's price. Cougar 600M is an option too - 47 EUR.

500M specifications:
- Sensor: ADNS-3090 Optical gaming sensor
- Resolution: 400/800/1200/1600/2000/2400/3200/4000 DPI
- Game type: FPS / MMORPG / MOBA / RTS
- Polling rate: 1000Hz / 1ms
- On-board memory: YES
- Software: COUGAR UIX™ SYSTEM
- Programmable buttons: 6
- Switching: OMRON gaming switches
- Profile LED backlight: 16.8 million colors
- Frame rate: 6400 FPS
- Maximum tracking speed: 60 IPS
- Maximum acceleration: 20 G
- Interface: USB plug
- Cable length: 1.8m Braided
- Dimension: 135(L) X 70(W) X 45(H) mm
- Weight: 115g

550M specifications:
Sensor: SDNS-3988 Optical gaming sensor
Resolution: 50-6400 DPI
Game type: FPS / MMORPG / MOBA / RTS
Polling rate: 1000Hz / 1ms
On-board memory: 512KB
Software:COUGAR UIX™ SYSTEM
Programmable buttons: 6
Switching: OMRON gaming switches
Profile LED backlight: 2 ZONE 16.8 million colors
Frame rate: 12500 FPS
Maximum tracking speed: 200 IPS
Maximum acceleration: 50 G
Interface: Golden-plated USB plug
Cable length: 1.8m Braided
Dimension: 135(L) X 70(W) X 45(H) mm
Weight: 120g

600M specifications:
- Sensor: ADNS-9800 Laser gaming sensor
- Resolution: 8200 DPI
- Processor: 32-bit ARM Cortex-M0
- Game type: FPS / MMORPG/MOBA / RTS
- Polling rate: 1000Hz / 1ms
- On-board memory: 512KB
- Software: COUGAR UIX™ SYSTEM
- Programmable buttons: 8
- Switching: OMRON gaming switch
- Profile LED backlight: 16.8 million colors
- Frame rate: 12000 FPS
- Maximum tracking speed: 150 IPS
- Maximum acceleration: 30G
- Interface: Golden-plated USB plug
- Cable length: 1.8m Braided
- Dimension: 125(L) x 80(W) x 42(H) mm
- Weight: 90g