Micron E die. If anybody says you MUST get a good kit of B-die, don't bother with them. At best the tighter timings B-die gives over E-die will give you like 3-5% more memory bandwidth which you'll never notice (plus the least expensive kit of good B-die in a 2x16GB kit is $230).
Board is fine. Technically the X570 TUF has the same exact VRM but if you're going for the color, may as well.
SSD swap to a Phison E12 + Toshiba BiCS TLC clone. The least expensive ones are the Team MP34 ($104 though every time it comes back in stock it immediately goes out of stock) or the Pioneer APS-SE20G (it went up to $113 but it was at $100 for awhile. Will probably creep down again). The other clones are usually more expensive or are from Inland Premium or Addlink, neither of which I've heard of before so support might be weird if you ever need it for some reason. You get like 80-90% performance of the Samsung for as little as 50-60% of the price.
Comparison (the blue bars are the clones Anandtech has tested): https://www.anandtech.com/show/14331/the-team-group-mp34-512gb-ssd-review/3
Not sure why the NH-D15 is $100 though (maybe you're in CA?). I keep seeing it for $80 (D15S technically but performance is the same). Maybe you're looking at the chromax black edition? Or maybe you've just added in the cost of the Chromax White heatsink covers.
Great rig you built here. My only advice is spend 85 bucks and get the DRP4 instead of the Noctua My father uses it and his 9900k has been superb and he keeps telling me how fast it is...... It barely spins the fans to cool it even on full load. Where as Noctua fans have to spin fast to disspate the heat. The DRP4 is basically the size of a mini basketball ,,, two quiet fans. I highly suggest it. Other then that all is good. The video card will go well with your system. IT will really shine on a 144hz gaming monitor which are dirt cheap depending on size and resolution of course.