Third Build - Future Proofing and Good Visuals

[Crazy Danish]

I'm looking for advice on my third build; both of the previous two were built with advice from here (thought can't find my original account) given it's the most helpful place online I know!

I favour builds that have long term resilience/upgradability so that they can last a while. Previous build was 7 years ago and I realise it's just not compatable with current tech without a lot of throttling.

• NZXT H440 New 2015 Edition Case - Matte Black
• Asus Maximus VIII Formula Intel Z170
• Intel Core i7-6700K 4.0GHz (Skylake)
• Corsair Dominator Platinum 32GB (4x8GB) DDR4 PC4-25600C16 3200MHz Dual/Quad Channel Kit (CMD32GX4M4B)
• EVGA GeForce GTX 960 SSC 4096MB GDDR5 PCI-Express Graphics Card (04G-P4-3967-KR )
• NZXT KRAKEN X61 280mm AIO Water Cooling Unit
• Corsair HX750i 750W Power Supply
• Samsung 1.0TB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive (MZ-75E1T0B/EU)
• Intel 750 Series 800GB PCIe 3.0 X4 HHHL Adaptor NVMe Solid State Drive (SSDPEDMW800G4X1)
• Samsung 950 Pro 256GB M.2 PCI-e 3.0 x 4 NVMe Solid State Drive
• WD Blue 4TB SATA 6Gb/s 64MB Cache HDD - OEM (WD40EZRZ)

For the new gaming rig, I'd like to prioritise future proofing it first. Concerns in picking parts are PCIe 5 and other upcoming standards I'm not aware of. Would any of my storage devices above be useful with such, or a full replacement?

Second is to achieve great visuals on new dual monitors (1x WQHD 3440 x 1440 and 1x QHD 2560 x 1440) and seperatly on my TV (4k). Ignore monitors for budget.

Budget ~£2-2.5k, but open to higher specs if it meets one of the two priorities above. I've been reading about the 7800X3D / RX 7900XT combo as a good cost/benefit ratio, but open to altneratives as I don't know the longevity of those.

Thanks!