Thinking of updating these components.  Already have the RX 480, creative soundcard, case, drives etc so no need to update these.

Thinking of Intel Core i5-6600K and AsRock Z170 Gaming K4 Skylake ATX Motherboard with 16Gb Ram.

Mobo : https://www.amazon.co.uk/AsRock-Z170-K4-Skylake-Motherboard/dp/B012D7GXNK/ref=sr_1_1?ie=UTF8&qid=1468843459&sr=8-1&keywords=fatal1ty+z170+gaming+k4

Anything I need to consider here on the Mobo, looking at this one as its a best buy #2 mobo at the moment based on TomsHardware site.

if your not going to overclock save your self ?20 and go with the non k 6600

have no experience with asrock, but have had zero problems with the Asus or Gigabyte boards i've used over the last six or seven years

https://www.scan.co.uk/products/intel-core-i5-6600-s-1151-skylake-quad-core-33ghz-39ghz-turbo-6mb-cache-1150mhz-gpu-33x-ratio-65w-cp

https://www.scan.co.uk/products/asus-z170-k-intel-z170-s-1151-ddr4-satae-m2-(pcie-sata)-2-way-crossfire-realtek-gigabit-lan-usb-31-a

https://www.scan.co.uk/products/16gb-(2x8gb)-corsair-ddr4-vengeance-lpx-black-pc4-17000-(2133)-non-ecc-unbuffered-cas-13-15-15-28-xm

Cheers Rob.  I actually have one of those M.2 PCIe drives kicking about, think its only around 60Gb though, will check tonight.