Currently Online 
Chazore, you do know that there are back Noctua fans, right?
https://www.scan.co.uk/products/120mm-noctua-nf-s12b-redux-pwm-1200rpm-quiet-case-fan
or https://www.scan.co.uk/products/120mm-noctua-nf-f12-industrialppc-2000rpm-high-performance-fan
though this one won't be quiet at all
As for the monitor, given that you want a 27", 1080p, 144Hz and G-Sync, I'd go with the Acer Predator Z271
https://www.scan.co.uk/products/27-acer-predator-z271-1920x1080-144hz-curved-169-va-display-nvidia-g-sync-4ms-dp-hdmi-usb-hub-black
It's a bit pricey and curved, but it has an VA panel with a 3000:1 contrast ratio, 4ms response time, Flicker Free and the TFTCentral review of it is very positive
http://www.tftcentral.co.uk/reviews/acer_predator_z271.htm
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.
