I don't recommend Razer for keyboard choice. The best thing to do is just buy a good quality mechanical keyboard, I guarantee that you will find something that you like. Take note that a product that has "gaming" in the name will probably add $20 for no reason.
The mouse is a different story. If you are gaming with your stuff, (I'm guessing you are) get a proper mouse. Don't buy Razer/Madcatz. I suggest Corsair, Zowie or Steelseries (No I don't do eSports, they make good quality mice.).
I'd say the microphone is overpriced, get a USB AT2020 or a Samson C01U. There is no need for a Yeti. Doesn't your headset come with a microphone?
Speaking of which, that is a good headset.