thestryker
Splendid
The point is more that you could potentially spend less for 4090 performance that uses less power (see 4080 vs 3090\3090 Ti) by waiting.I don't plan on going to 4K. I am happy with my 1440P monitor. I think the 4090 is already more than enough to pair with a 5900X. The only way I would upgrade to a 5000 series is with a complete rebuild. Not ready to do that yet. Current build only 3 years old.
Your goal also seems to be high refresh rate which your CPU is going to negatively impact by a fair amount. Going from a 4080 Super to 4090 at 1440p is about a 20% performance jump on a system without a CPU bottleneck and around 12.7% on one that does. Going from the 5900X to a 5800X3D while using a 4090 is a jump of around 13.5% by itself. A CPU upgrade obviously isn't going to turn your 3080 into something it's not, but if you're talking spending $1800+ on a video card is certainly something you should seriously consider.