Another NR200P with a COOL BIG TWIST (CBT)!
I'm using the NR200 3D printed extension, made by BlueThreadGear, to house the hulking NH-D15S (inverted) with the Chromax white heatsink covers.

CPU and GPU
I managed to get a 5900X from Amazon at MSRP. I'm currently waiting for the RTX 3080 Ti to exist. I plan to upgrade from my GTX 1080 Ti.

Mobo
I'm using the ROG Strix X570-I, which had its BIOS pre-updated to support AMD's 5000 series. This board lacks a BIOS Flashback feature, so you'd otherwise need an older CPU to update it first.
The board has a fairly large i/o shield. However, after taking off the shield and (somewhat hesitantly) sanding down the NF-A12x15 on two sides, I managed to squeeze the 120mm fan back there. I'm using this fan as a rear intake, with a low noise adapter, assisting the NF-A15 that comes with the NH-D15S.

Cooler
I'm a big fan of air cooling. And the NH-D15 is the best option, and I love how it looks with the Chromax heatsink covers. Using the extension bracket by BlueThreadGear, the standard NH-D15 fits just fine, even with two 25mm thick fans on top. However, it can't quite fit the top-left fan with the NR200(P)'s fan grill in place, which was slightly annoying. I needed a new heatsink anyway, so I ordered the NH-D15S (Chromax), which I'm using inverted, giving me plenty of room at the top to fit the full fan grill. With the inverted heatsink and the heatsink covers, it just barely fits up against the GPU backplate.

Case Fans
I didn't want to wait for Noctua to make a Chromax NF-A12x25, so I went with four of Thermaltake's Toughfan 12s. They do the job nicely, but be warned, they have obnoxiously long fan cables. These are not well suited for SFF builds. I had to heavily bundle the cables up against themselves to manage the length.

PSU
I'm using the tried and true SF750 from Corsair. It's plenty of power for me. The cables are very nice, but they're kind of a pain to manage in the NR200(P). The 24pin cable is an especially annoying length to route, but I don't think going all out with custom cables is necessary. Maybe I'll get custom PCIe cables since that's such a short run. I have the CPU cable routed behind the mobo tray.

Accessories
Once again, I'm using the 3D printed Side Panel Extension made by BlueThreadGear. This extension is what made me choose the NR200P in the first place. I otherwise was considering Lian Li's TU150, or Sliger's S620, but I wasn't entirely happy with either of those. This extension made the NR200P check all my boxes.

I installed one Phanteks Neon Digital-RGB strip (400mm) around the bottom frame of the NR200P. I think it looks nice, and I plan to put another in the top frame.

I am also using the Tundra Labs 12VDC Power Kit for Head Mounted Displays, which lets me plug my Valve Index headset entirely into my PC. No need for a spare wall outlet. It fits nicely behind the bottom fans, attaching to my otherwise unused third PCIe slot. So I can't really use a triple slot card unless I want to drill a new hole in the case.

In the future, I plan to set up a Raspberry Pi screen on top of the PSU shroud, as a system display.