Best case for dual RTX 3090 (250W each) on Crosshair VIII Hero?

I'm building a local LLM workstation and would appreciate some advice from people already running 2×3090s.

Current hardware:

• ASUS Crosshair VIII Hero (X570)
• One Gainward Phoenix RTX 3090
• Looking for a second used 3090 (not necessarily the same model)
• Both GPUs will be power-limited to ~250W

I'm trying to keep the case budget under 200 euros SEK (including any extra fans), but might stretch if neccesary...

So far I've been looking at:

• Fractal North XL Mesh (looks nice, but worried about thermals)
• Meshify xl 2 (better thermals but expensive, still not so good thermals due to cards sitting close horizontally?)
• Lian Li O11D EVO (second GPU mounted vertically via a PCIe 4.0 riser?)

Has anyone here built a stable 2×3090 air-cooled system? If so:

• Which case did you choose?
• What GPU temperatures do you see under sustained LLM inference/training?
• Any regrets?
• Has anyone had good results with a vertical-mounted second GPU?

Photos of your builds would also be greatly appreciated.

Thanks!