Help me complete my build

After months of saving, I finally managed to get some parts for building a decent pc…
But there are about 2 things remaining in completing the rig.
Please suggest me what to buy…
Here are the components that I managed to buy:-

1. Processor: Ryzen 9 9900x
2. RAM: Corsair Vengeance 16x2 cl36 6000mhz
3. PSU: Corsair rm1000e 1000W Gold
4. Motherboard: MSI X870e Gaming Max WiFi 7
5. SSD: Kioxia Exceria G3 2TB NVMe SSD
6. GPU: PNY RTX 5070ti

Help Me in recommending :-
1) Cooler
2) Cabinet

P.S:-
Would be grateful if you can suggest a good 1440p monitor upto 30k