[PC Config] Need opinions and suggestions for improvements (airflow, RAM, GPU?)

Hello everyone,

I am finalizing an ATX configuration and I would like to have your opinions on optimizing certain components. My main goal is to have a high-performance PC for 1440p (and maybe 4K) gaming with excellent cooling and longevity.

Here is the current config:

🔹 Motherboard: ASRock X870E Taichi 🔹 Processor: Ryzen 7 9800X3D 🔹 Cooling: Arctic Liquid Freezer III 360 🔹 RAM: (Hesitation) G.Skill Trident Z5 Neo vs Corsair Vengeance 2x32 GB 6000 MHz CL30 or CL28 (AMD EXPO) 🔹 Power supply: Corsair RM1000x (ATX 3.0) 🔹 Storage: Samsung 990 Pro 2 TB (PCIe 4.0) 🔹 Graphics card: I already have an RTX 3070 Super → Upgrade necessary? 🔹 Case: Hesitation between Corsair 4000D Airflow, Lian Li O11 Dynamic or other (best possible airflow, regardless of design).

My questions:

1) Housing: What is the best choice in terms of airflow? I'm hesitating between the 4000D Airflow and Lian Li O11D, but am open to other options (Fractal Torrent, Phanteks NV7?). 2)RAM: Is the G.Skill Trident Z5 Neo a better choice than a Corsair Vengeance in 6000 MHz CL30/28 for AMD optimized dual-channel (FCLK ratio 1:1)? 3) GPU: My RTX 3070 Super is still decent at 1440p, but is it better to keep it or upgrade to an RTX 4070 Ti Super / 4080 Super? 4) Cooling & Power Supply: Are my AIO 360mm + RM1000x sufficient for this configuration in the long term?

Thank you in advance for your opinions!