Lot people say the brown switches is best 1st greasy what I've read , I have blacks tho never tried the others ....I'm still using the 1st gaming keyboard with black switches and its lasted a long time got really used to it (raptor gaming) but ordered the new Ducky DK-9087 Shine 3 TKL blacks 
I also recommend the Cherry Black CyMotion Expert but its not mechanical keys

I also recommend the Cherry Black CyMotion Expert but its not mechanical keys