Replying to Video editors help me with PC build questions

I am building a new PC and have a decent budget this time.
I will primarily be gaming and video editing with some background software running (music, recording devices, VM). My current spec out is overkill, but I want to know how much. Also, I want lasting power so I dont have to build a new one for a while. Here is my current spec:
i9 9900K coffee lake (can save 140 to downgrade to the i7 9700k)
32GB RAM DDR4 3200 ( can save ~100 downgrading to 16Gb 3200)
ASUS GeForce GTX 1070 DUAL-GTX1070-O8G 8GB 256-Bit GDDR5 (this is where I think I may want to upgrade and maybe lower the previous two thoughts?)
ASUS ROG Strix Z390-E Gaming (will take suggestions here too)
1000W G1+ 80 Plus gold power supply (Have a 750W that I could use and save $128)
CPU water cooler 2x240 fan radiator (could save 120 sticking to fan cooling. Keeping this requires me to buy a new case so I can fit the radiator fans)
Well ventilated fan covered case (Have a case but I need a new one for the water cooling radiator. Could save $88 to reuse old case)

This current build will run just shy of $1800 with some goodies thrown in by the brands. If I choose all downgrades I would save ~$600 that could be saved or repurposed into a better graphics card.
What are your thoughts on everything? Is the upgraded cpu and RAM worth ~$240 combined?

**This thread was edited on Dec 4th 2018 at 1:33:57pm