Corsair CC-9011201-WW 4000D Airflow Tempered Glass White Steel ATX Mid Tower Desktop Chassis

I upgraded to this from my old Corsair 450D. It's notably smaller, but since it didn't have 5.25" drive bays, I thought it would still be spacious enough for my custom water cooling loop.
I can fit my loop, but it's real tight, and I needed to 3d print a bracket for the pump/res combo to fit in the front. I had to use a 240mm rad in the top because the front would limit my GPU and hard drive space.

If you want to use a front rad, it's basically limited to 30mm, a 40mm rad might fight, but it'll basically be scraping the port at the bottom and will have very little space for you pump/res. As it stands, my res needs to be placed above my GPU, so it has to be a short one, and thats with my rad in the top instead.
Cable management is not bad, though it doesn't have a lot of space in the bottom if you want to use the hard drive bay, even with a modular PSU.

The side panels are really nice since they lever on and push the cables without having to fight with multiple locking points. It's just the front and back.

My 2 biggest issues with this case is however is 1, a top slim rad gives you very little space to work with. It's shorter than the 450D and the fans end up above your motherboard making plugging in headers really difficult and 2. the top dust filter is super restrictive. I have a lot of airflow through the rad without it on, it blows an A4 page off the top of my case, but with it on, you could barely even tell the fans are blowing at all and my CPU (288W 13700k) overheats in less than a minute. With it off it's fine, but because there's so much space around your fans, having it off means you end up with dust falling into the top of the case.
The 450D had a similar magnetic dust filter, but wasn't nearly as restrictive.

Overall, if you just stick to SSD storage, mount a 30mm (maybe 40mm with a tight squeeze) rad in the front, and your GPU still has clearance. It'll actually be a really solid case. I just really wish they made it 10mm longer and taller for my setup.

absolutely love it...1st case ever built, tons of space and the airflow is magnificent.Would definitely recommend this case.

The air flow is superb in the 4000D. Very well built. Looks amazing. Comes with Velcro straps to help with cable management as well as a cable ''guide'' behind the motherboard.

Took awhile looking for a new case and finally decided on the 4000D as my old case was really bad with airflow and cramped inside. This one however, lots of good airflow, spacious inside, can fit wide variety of CPU coolers and GPU's, solid cable management so overall really pleased and happy with what I wanted to get from a new case.

This is just an outstanding product. It looks great and is so easy to work on. The cable management routing with Corsair logo'd velcro cable ties is a nice touch.