First time build for 6 monitors, non-gaming lots of browser tabs

I am building a computer for work where I'll have 6 monitors and typically keeps dozens of Chrome browser tabs open at a time. Most of what I do is in the cloud but I also use a few other programs as well. No gaming, not much video beyond occasional youtube. Just need lots of screen real estate and enough horsepower to avoid glitches. My 4 yr old computer with 5 monitors got too slow and unreliable so I'm trying to build a computer for about $2K with lots of RAM and decent video card(s) to accomplish my purposes and maybe leave room to add another monitor or two in the future.

I just ordered all this stuff and realized I probably should have asked for an opinion before doing so, but it hasn't arrived so I haven't attempted to build it yet.

I think I paid $50 too much for 3200 RAM since the motherboard only goes to 2666.

I've never assembled a computer before, though I have upgraded a few parts in the past. But I'm looking forward to figuring this out.

Any critiques or suggestions would be much appreciated.

Here's my original parts list:

https://pcpartpicker.com/list/4TXCJb

After 2 tweaks, the latest parts list is:

https://pcpartpicker.com/list/2VBgsk

I swapped out the video card for 2 Radeon RX 570's so here's my latest setup:

https://pcpartpicker.com/list/Q4c6hg

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