sck451
MOST VALUED CONTRIBUTOR
Personally I wouldn't bother with 4K. The improvement in sharpness just isn't worth it compared to what it costs in frame rate. Also, a 4K display would be 32", which may not be what you want?Price is fine, well within budget, but I believe with the 4080 super im better off going 4k, feel I’ve entered a wormhole now haha but once the monitor is done , the MB is back in stock 12/10 so im Good to go as of then
The only reason not to pair a 4080 Super with a 1440p display is that it's not the best value for money. You get diminishing returns as the limit becomes the human eye. But this isn't a value for money build, really! So I'd feel comfortable doing it in order to get a really really good monitor and a graphics card that can drive it to its limit. Personally I don't think the argument for 4K is really that convincing.
By the way, you asked about motherboards. The more expensive motherboards add features (PCIe gen 5, more fast USB, more VRMs, maybe more M.2 ports, maybe faster networking) that probably aren't crucial to you. I'd probably get the Tuf X670E board in case PCIe5.0 becomes relevant in the lifespan of the PC, but I would also be very happy to say "go with the Tuf B650 board".