PC build

hey, im building my first Pc ever i kinda need some help, i bought most of it and need some advice on the few last parts 1. Rx7900 xt as rock 2. Aorus Z790 pro X 3. I9-14900k 4. asus rog ryujin iii 360 argb 5. Case Thermaltake Tower 600 6. T-force delta rgb ddr5 32gbx4 rams

          I need help for

1. Should i go for 1050w thermaltake psu or 1200w, can the 1050w handle these
2. For Ssd im thinking the 990 Pro nvme M.2 Pcie Gen 4, 2tb ( but i look it up and this board say that it support Gen 5, any recommendation or this Ssd is good .-.?
3. Anything im missing to build the Pc .-.? Im running an msi 40inch monitor 2k and 1 4k samsung 28inch monitor! Thank you so so much for reading and healping me !!!