I am not experienced in mechanical keyboards, but I had few of them.
I need your help.
I am looking for 60-75% (prefer 75), not black (can be gray

Backlight - optional (can' t be red)
What for I use a keyboard? Most of the time - work, but I like to play some games like guildwars 2 or some fps games.
Oh, forgot about price. Bellow 300 zlotych. It' s about 80 us dollars.
I like how xiaomi mk01 looks, but it has 2key rollover (dunno if it will be blocking my keys)
I would be grateful for help guys. I am totally newby in this segment.
@PS I have possibility to buy corsair k63 for ~54 dollars or k65 veagance for 54 dollars too. Are they worth that money? Can I change backlight in k63 from red to other by changing leds?