Dude,the G-SYNC screens use a low volume custom scaler and Freesync uses newer generation standard scalers which will become more and more common.
You can get Freesync monitors with decent specs for £200 as the hardware behind it is part of a VESA standard. Even Intel has said they will look to support the hardware too at some point. That will always make Freesync cheaper as it will be supported by more scaler makers.
I would probably seriously consider an R9 390.
Also the GTX980 is not really worth it with the R9 390X being under £300. Not even the biggest Nvidia fans I know on OcUK even recommend the GTX980 now as its pricing is neither here nor there.
Edit!!
This monitor is under £200:
The Sapphire R9 390 Nitro can be had for around £250:
So,for little more than the cost of the GTX980 you get both.
Second Edit!
I see you are going with a non-K Core i7 6700. If overclocking remember you need to disable most of the power saving options and run the CPU at full speed
IIRC. Also the temperature sensor does not work properly and any microcode updates from Intel might stop you overclocking - there might be one incoming for the bug that was reported. OFC,it might be fine especially if motherboard companies factored that in.
If you are not overclocking then I would ditch that cooler! Get something like a £20 to £25 if you want better noise profile than stock.
The motherboard is quite expensive if you are not overclocking too.
Plus, the other thing is if you are willing to spend that kind of money on a CPU and motherboard, you might want to consider the Core i7 5820K too.