This is a build for game development, mainly using Unity game engine, visual studio, blender, and photoshop. I also plan to game on this computer, but not much to make it worth purchasing a better GPU.
This case has the advantage of supporting ATX PSU and 3.5 HDD. Also, I was planning to use 2700x with stock cooling, so this looked like the best option for a small PC.
However, I have to warn you that stock cooling of 2700x and 3.5 HDD hardly fits in this case because of copper heatpipe coming out of the cooler. I had to remove rubber anti-vibration parts and still the CPU cooler is pushing hard on the HDD when I assemble the case.
The case is designed really well. It's very modular, you can remove every panel. It's even possible to flip motherboard/GPU orientation completely. But the default was fine for me. Using non-modular PSU with this case isn't a good idea. This was my old PSU so I had to stick with this one, but it made the assembly and cable management 2 times harder.
My only request would be to have 2 top fan mounts instead of 1. But you can partially solve this problem with the suggestion I written below.
My initial cooling was this; Used the stock cooler as the top intake fan. Rear fan as intake PSU exhaust
For this setup, I could rotate PSU fan, and make the rear fan as an exhaust for better cooling, but it seemed too complicated for me so I decided to make it this way to have positive pressure. But it was insufficient. (CPU temp was rising to 87 degrees with prime95) Case interior was also heating up after about 5 minutes. And I guess CPU would heat up even more if I didn't stop the torture test. One big reason it was inefficient was how the CPU cooler worked. It pushes hot air to front/rear of the case. And as I made the rear fan an intake, they were fighting each other. (I have one picture showing that)
Then I decided to flip the exhaust fan, but It would cause negative pressure as the case stock fan isn't sufficient against PSU and the rear fan working as exhaust. So I bought the most powerful fan I found that could fit in this case. A 14cm Noctua NF-A15 HS-PWM as an intake fan. I was worried that it wouldn't fit, but I found a comment on Reddit claiming that a similar cooler fits. And it worked brilliantly. Even though the fan is larger than the surface of fan intake slot and there is a GPU right below it, that fan is really powerful and it's easy to feel the difference compared to the stock fan. I believe it's about 2 times stronger with a lower noise level. (I modified fan curve in bios so it normally runs at 55% where I can't hear, when it's 100% it's noisy) So, yep, I believe this is the most powerful and silent fan you can buy for Raijintek Metis Plus. And it's 14cm.
After this fan update, I felt that some cool air was coming out from the back side of the case without cooling anything(like a short circuit), so I used a black tape to block those vents to make ventilation more efficient. (The last picture where I marked those tapes as red, ) But tapes are falling out, maybe I can use some kind of magnets.
I didn't test the GPU temperatures yet, but I believe GPU wouldn't really need to run its own fan with that 14cm intake fan blowing right on it.
I also made a window side panel watching this video: https://youtu.be/SiM04iweOHM It doesn't only look better, but also makes the PC look smaller from where I sit.
The case I compared for the size is a Corsair Carbide 100R