I need some help choosing peripherals, I like LEDs and I really like the look of the Razer Chroma series and the Corsair RGB series. Anyone own either of these? Looking at the blackwidow and the K70 respectively.

In terms of a mouse I'm thinking of matching it to the keyboard by getting either a Corsair or a Razer mouse depending on the keyboard I get. Anyone have any major problems with Razer/Corsair or any alternatives?

Headphones I'm thinking just a studio set... my friend has a pair that I really liked that cost about £100 and then just the cheapest rode microphone.

I'm putting this together over summer so I have a lot of time to change parts and things like that. I am planning on putting it together myself with help from some friends but the watercooling part scares me... any advice?