the newer blackwidows these days are trash. thank god I still have my 2012/11/10 one. go with the K70 RGB, please, it's higher quality and is good material for gaming. and it actually has mechanical switches, unlike razer's crappy self made ones.
Will that's your openoin I totally disagree with you becouse you can edit your keyboard and the chroma effect is much more better.
I agree with Harry. Razer is more expensive and k70 has much better build material. Razer uses their own "green" switches which are made from a japanese company of lower quality, while corsair uses the cherry mx switches of your liking. And addressing razer's "chroma" addition with all the colors, yeah you can do the same with k70 rgb.
What? speak ENGLISH, please. The K70 RGB allows you to also edit your keyboard, the thing is, it's just complicated. But you can also get a K95 RGB that has ALOT of macros that go with it.
And there's me in the corner rooting for the Cooler Master Quick Fire Rapid-i because I prefer tenkeyless keyboards :L