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mechanicalkeyboards.com have the ANSI UK layout for Leopold, I believe, but the corsair sounds like its a better keyboard in pretty much every area for you, so go ahead and get that one. 

First, try to send it to Razer for a replacement. Even if it's out of warranty, they may still give you a discount.

Corsair makes good stuff so they're a good choice. I'm a person that would build their own keyboard but a lot of people don't want to take the time to do that. Corsair is probably your best choice unless you're considering Logitech.

Theres a company that makes more typing based keyboards but are amazing quality, Leopold. I can't really think of anything off of the top of my head for gaming that isn't corsair, logitech, or razer.

£439, 27", 1440p 144hz,and it has 2 hdmi as well as displayport
 
https://www.overclockers.co.uk/asus-mg279q-rog-dominator-27-2560x1440-ips-freesync-144hz-gaming-widescreen-led-slim-bezel-monitor-mo-083-as.html

https://shop.ekwb.com/ek-xlc-predator-360-incl-qdc

Predator 360 when it comes out and you don't need the bracket. use a ek water block designed for your gpu and go to their config on their website.
 
Edit: if you're planning on cooling both a gpu and a cpu with you'll need two of them if you can fit them in your case of course