Help upgrading my Aurora R4

Hello everyone!

I'd just like some help with upgrading my PC, I'm looking to spend anywhere up to £1000 but rather not go over that.

My current specs: 

System Model: Aurora-R4

Processor: Intel(R) Core(TM) i7-4820K CPU @ 3.70GHz (8 CPUs), ~3.7GHz

Memory: 8192MB RAM

Card name: NVIDIA GeForce GTX 760

I'm looking to upgrade a couple components inside my PC now, mainly the RAM and Graphics card.

Most keen on the NVIDIA GeForce GTX 1070 but I just want to check to see if this is even compatible?

Also looking to upgrade the processor I have to the i7-6700 4GHz as I've been told my processor wouldn't do the GTX 1070 any favours.

And obviously I'd be looking to bump up my RAM and change my two 4GB cards to two 8GB cards.

Is there anything I've pointed out that would seemingly be incompatible or cause power issues?

If further information is needed just shout.

Many Many Thanks,

Robbie