Question PSU for i7 13700K and 4070ti (oc)

Why do you want to OC your 13700k anyway? its already binned to eek out all the performance.

I would just focus on enabling XMP unlocking turbo duration and leaving the rest on OC mode if you got one in your GPU profile.

1080p monitor for 4070ti? you can easily do 1440p ViewSonic XG2705-2K OMNI 27.0" 2560 x 1440 144 Hz Monitor (XG2705-2K) - PCPartPicker

Side note: have you checked the 7000X3D reviews? the 7900X3D is available now.

Looking at your build:

I would spend £20 more and get a better 500gb OS drive
Spend a bit more for a good case Fractal Design Pop Air ATX Mid Tower Case (FD-C-POR1A-02) - PCPartPicker or be quiet! Pure Base 500DX ATX Mid Tower Case (BGW37) - PCPartPicker
downsize to a good 850W psu. or or