You're welcome and sorry again for the negativity and bluntness.
Are you able to cancel the orders or tell the store that you'd simply like to switch your order for a different product?
If you're mostly gaming, the 13700xx will give you like 95 - 100 % the gaming performance of the 13900xx. The additional e-cores on the 13900xx will make highly multithreaded workloads, like productivity stuff, faster (video rendering, advanced image editing, compression, etc.) but even a lot of that stuff won't always see a benefit as they sometimes mostly rely on the GPU to do the work rather than the CPU. The amount of p-cores, e-cores, and total threads is still plenty on the 13700xx.
If you're getting the K / KF model, then I'm assuming you're planning on overclocking them in which case you need a Z690 or Z790 board to do so but, again, I'd try and cancel the pre-order for that particular motherboard as 490 GBP for a board is, by far, the worst value out of all the parts you picked. I'd personally pick a Z690 board as the Z790 boards are going to be over-priced - even the ones less expensive than that Asus one - and the Z790 boards basically offer no improved performance over Z690.
Z790 boards are basically Z690 boards with jacked-up pricing. The feature upgrades are minimal. Kind of a joke to be honest. I see an MSI Z690 Edge DDR4 board for about 250 - 255 GPB. It'll give you identical CPU performance to that double-the-price Z790 board. Good DDR4 b-die RAM will give you better framerates and 1% lows than most DDR5 kits. I saw a FrameChasers video where he had DDR5 that won't be out for a long while still - 7600 MHz CL 32 (via contacts from China) - and even that only beat high-end DDR4 by like 1 - 5 %. DDR5 is still pretty bad for gaming especially considering the price.
DDR4 4000 VS DDR5 6800. The REAL STORY.
DDR5 7600 VS DDR4 4000, THE FINALE. BENCHMARKED MAX OVERCLOCK
The cooler is easy: Arctic Liquid Freezer 2 AIO. They have them in all sizes, 240 mm, 280, 360, even 420 (the corsair you picked is a 360).
The 5000D airflow, honestly, even if the GPU runs a bit hot in it, it's not going to make much difference besides the fans running a lil faster/louder and/or the GPU clocking down a little but so little that you won't notice a difference in games. I wouldn't worry about it. You can always add some cheap (but good) fans, like Arctic P12 fans, that can help. Especially if you can find it for it's MSRP of around $165 USD (I've seen it inflated to $250 USD at some stores lately which I think is way too much).
That case, is honestly the last thing I'd worry about in terms of what you're getting for your money with the motherboard being the first.
In short, a Z690 board, B-die dual-channel DDR4, 13700K/KF. Now that's a killer system at a killer price that'll perform 99% of games at about the same performance as a Z790 / 13900xx / DDR5 setup. If you like upgrading often, I'd skip Intel 14th gen (Meteor Lake) and upgrade to 15th gen (Arrow Lake) when it comes out (or the AMD equivalent) and at that time also move to DDR5 as kits will perform much better and at much lower costs by then. Hopefully by then we'll have 9,000 - 12,000 MHz kits at decently low latencies.
