Your points are noted, but you introduce building a system using second hand parts, etc. The question was simple, the guy is getting a "new rig very soon", seemingly for flight sims. I didn't get that he was a system builder from that. It always comes down to budget, even using your logic. The higher spec system you buy/build today, the longer you can stave off upgrading. If you build systems and enjoy tinkering, by all means swap out/upgrade components as the opportunity arises. Even my latest system was a compromise as I had just purchased a matched set of 64GB DDR4, but i've literally built 100's of systems since the inception of the 8086 PC in the 80's... For GPUs I would say the best bang-for-buck in the Nvidia line is the 4070 right now, 1/3 the cost of a 4090 with very good overall performance. https://gpu.userbenchmark.com/Compare/Nvidia-RTX-4090-vs-Nvidia-RTX-4070/4136vs4148